diff --git a/crates/forth/src/ops.rs b/crates/forth/src/ops.rs
index df9251e..003700d 100644
--- a/crates/forth/src/ops.rs
+++ b/crates/forth/src/ops.rs
@@ -95,6 +95,8 @@ pub enum Op {
     Ramp,
     Triangle,
     Range,
+    LinMap,
+    ExpMap,
     Perlin,
     Loop,
     Degree(&'static [i64]),
diff --git a/crates/forth/src/vm.rs b/crates/forth/src/vm.rs
index f9436fa..7d764ae 100644
--- a/crates/forth/src/vm.rs
+++ b/crates/forth/src/vm.rs
@@ -1083,6 +1083,28 @@ impl Forth {
                     let val = pop_float(stack)?;
                     stack.push(Value::Float(min + val * (max - min), None));
                 }
+                Op::LinMap => {
+                    let out_hi = pop_float(stack)?;
+                    let out_lo = pop_float(stack)?;
+                    let in_hi = pop_float(stack)?;
+                    let in_lo = pop_float(stack)?;
+                    let val = pop_float(stack)?;
+                    let t = if (in_hi - in_lo).abs() < f64::EPSILON {
+                        0.0
+                    } else {
+                        (val - in_lo) / (in_hi - in_lo)
+                    };
+                    stack.push(Value::Float(out_lo + t * (out_hi - out_lo), None));
+                }
+                Op::ExpMap => {
+                    let hi = pop_float(stack)?;
+                    let lo = pop_float(stack)?;
+                    let val = pop_float(stack)?;
+                    if lo <= 0.0 || hi <= 0.0 {
+                        return Err("expmap requires positive bounds".into());
+                    }
+                    stack.push(Value::Float(lo * (hi / lo).powf(val), None));
+                }
                 Op::Perlin => {
                     let freq = pop_float(stack)?;
                     let val = perlin_noise_1d(freq * ctx.beat);
diff --git a/crates/forth/src/words/compile.rs b/crates/forth/src/words/compile.rs
index c1ecba2..3297810 100644
--- a/crates/forth/src/words/compile.rs
+++ b/crates/forth/src/words/compile.rs
@@ -88,6 +88,8 @@ pub(super) fn simple_op(name: &str) -> Option<Op> {
         "ramp" => Op::Ramp,
         "triangle" => Op::Triangle,
         "range" => Op::Range,
+        "linmap" => Op::LinMap,
+        "expmap" => Op::ExpMap,
         "perlin" => Op::Perlin,
         "loop" => Op::Loop,
         "oct" => Op::Oct,
diff --git a/crates/forth/src/words/core.rs b/crates/forth/src/words/core.rs
index c6ee441..f511b98 100644
--- a/crates/forth/src/words/core.rs
+++ b/crates/forth/src/words/core.rs
@@ -354,6 +354,26 @@ pub(super) const WORDS: &[Word] = &[
         compile: Simple,
         varargs: false,
     },
+    Word {
+        name: "linmap",
+        aliases: &[],
+        category: "Arithmetic",
+        stack: "(val inlo inhi outlo outhi -- mapped)",
+        desc: "Linear map from [inlo,inhi] to [outlo,outhi]",
+        example: "64 0 127 200 2000 linmap => 1007.87",
+        compile: Simple,
+        varargs: false,
+    },
+    Word {
+        name: "expmap",
+        aliases: &[],
+        category: "Arithmetic",
+        stack: "(val lo hi -- mapped)",
+        desc: "Exponential map from [0,1] to [lo,hi]",
+        example: "0.5 200 8000 expmap => 1264.91",
+        compile: Simple,
+        varargs: false,
+    },
     // Comparison
     Word {
         name: "=",
diff --git a/crates/project/src/file.rs b/crates/project/src/file.rs
index e5ca0fa..119b4f0 100644
--- a/crates/project/src/file.rs
+++ b/crates/project/src/file.rs
@@ -101,7 +101,11 @@ pub fn save(project: &Project, path: &Path) -> Result<PathBuf, FileError> {
 
 pub fn load(path: &Path) -> Result<Project, FileError> {
     let json = fs::read_to_string(path)?;
-    let file: ProjectFile = serde_json::from_str(&json)?;
+    load_str(&json)
+}
+
+pub fn load_str(json: &str) -> Result<Project, FileError> {
+    let file: ProjectFile = serde_json::from_str(json)?;
     if file.version > VERSION {
         return Err(FileError::Version(file.version));
     }
diff --git a/crates/project/src/lib.rs b/crates/project/src/lib.rs
index 2667e9f..ad606d4 100644
--- a/crates/project/src/lib.rs
+++ b/crates/project/src/lib.rs
@@ -8,5 +8,5 @@ pub const MAX_PATTERNS: usize = 32;
 pub const MAX_STEPS: usize = 1024;
 pub const DEFAULT_LENGTH: usize = 16;
 
-pub use file::{load, save, FileError};
+pub use file::{load, load_str, save, FileError};
 pub use project::{Bank, FollowUp, LaunchQuantization, Pattern, PatternSpeed, Project, Step, SyncMode};
diff --git a/demos/01.cagire b/demos/01.cagire
new file mode 100644
index 0000000..c8075cd
--- /dev/null
+++ b/demos/01.cagire
@@ -0,0 +1,8370 @@
+{
+  "version": 1,
+  "banks": [
+    {
+      "patterns": [
+        {
+          "steps": [
+            {
+              "i": 0,
+              "script": "sine sound ."
+            }
+          ],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+            1
+          ]
+        },
+        {
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+          "speed": [
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+          ]
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+        {
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+          "speed": [
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+        {
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+          "speed": [
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+        {
+          "steps": [],
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+          "speed": [
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+          ]
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+        {
+          "steps": [],
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+          "speed": [
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+          ]
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+        {
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+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          ]
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+        {
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          "speed": [
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+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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diff --git a/demos/02.cagire b/demos/02.cagire
new file mode 100644
index 0000000..2a5a85c
--- /dev/null
+++ b/demos/02.cagire
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diff --git a/demos/03.cagire b/demos/03.cagire
new file mode 100644
index 0000000..53c7fb2
--- /dev/null
+++ b/demos/03.cagire
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+          "speed": [
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+          ]
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+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
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+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
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+        {
+          "steps": [],
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+          "speed": [
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+          "speed": [
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+          ]
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+          "speed": [
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+          "speed": [
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+        {
+          "steps": [],
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+          "speed": [
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+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
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+          "speed": [
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
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+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
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+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    },
+    {
+      "patterns": [
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        },
+        {
+          "steps": [],
+          "length": 16,
+          "speed": [
+            1,
+            1
+          ]
+        }
+      ],
+      "name": null
+    }
+  ],
+  "sample_paths": [],
+  "tempo": 120.0,
+  "playing_patterns": [
+    [
+      0,
+      0
+    ]
+  ]
+}
\ No newline at end of file
diff --git a/demos/04.cagire b/demos/04.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/04.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/05.cagire b/demos/05.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/05.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/06.cagire b/demos/06.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/06.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/07.cagire b/demos/07.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/07.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/08.cagire b/demos/08.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/08.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/09.cagire b/demos/09.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/09.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/demos/10.cagire b/demos/10.cagire
new file mode 100644
index 0000000..dc27c5b
--- /dev/null
+++ b/demos/10.cagire
@@ -0,0 +1 @@
+{"version":1,"banks":[],"tempo":120.0,"playing_patterns":[[0,0]],"prelude":""}
diff --git a/src/app/persistence.rs b/src/app/persistence.rs
index 19ba548..da8c67e 100644
--- a/src/app/persistence.rs
+++ b/src/app/persistence.rs
@@ -31,6 +31,8 @@ impl App {
                 layout: self.audio.config.layout,
                 hue_rotation: self.ui.hue_rotation,
                 onboarding_dismissed: self.ui.onboarding_dismissed.clone(),
+                load_demo_on_startup: self.ui.load_demo_on_startup,
+                demo_index: self.ui.demo_index,
                 font: self.ui.font.clone(),
                 zoom_factor: self.ui.zoom_factor,
             },
@@ -91,32 +93,7 @@ impl App {
     pub fn load(&mut self, path: PathBuf, link: &LinkState) {
         match model::load(&path) {
             Ok(project) => {
-                let tempo = project.tempo;
-                let playing = project.playing_patterns.clone();
-
-                self.project_state.project = project;
-                self.editor_ctx.step = 0;
-                self.load_step_to_editor();
-                self.compile_all_steps(link);
-                self.mark_all_patterns_dirty();
-                link.set_tempo(tempo);
-
-                self.playback.clear_queues();
-                self.undo.clear();
-                self.variables.store(Arc::new(HashMap::new()));
-                self.dict.lock().clear();
-
-                self.evaluate_prelude(link);
-
-                for (bank, pattern) in playing {
-                    self.playback.queued_changes.push(StagedChange {
-                        change: PatternChange::Start { bank, pattern },
-                        quantization: crate::model::LaunchQuantization::Immediate,
-                        sync_mode: crate::model::SyncMode::PhaseLock,
-                    });
-                }
-
-                self.ui.set_status(format!("Loaded: {}", path.display()));
+                self.apply_project(project, format!("Loaded: {}", path.display()), link);
                 self.project_state.file_path = Some(path);
             }
             Err(e) => {
@@ -124,4 +101,33 @@ impl App {
             }
         }
     }
+
+    fn apply_project(&mut self, project: model::Project, label: String, link: &LinkState) {
+        let tempo = project.tempo;
+        let playing = project.playing_patterns.clone();
+
+        self.project_state.project = project;
+        self.editor_ctx.step = 0;
+        self.load_step_to_editor();
+        self.compile_all_steps(link);
+        self.mark_all_patterns_dirty();
+        link.set_tempo(tempo);
+
+        self.playback.clear_queues();
+        self.undo.clear();
+        self.variables.store(Arc::new(HashMap::new()));
+        self.dict.lock().clear();
+
+        self.evaluate_prelude(link);
+
+        for (bank, pattern) in playing {
+            self.playback.queued_changes.push(StagedChange {
+                change: PatternChange::Start { bank, pattern },
+                quantization: crate::model::LaunchQuantization::Immediate,
+                sync_mode: crate::model::SyncMode::PhaseLock,
+            });
+        }
+
+        self.ui.set_status(label);
+    }
 }
diff --git a/src/init.rs b/src/init.rs
index cdef963..9445542 100644
--- a/src/init.rs
+++ b/src/init.rs
@@ -65,14 +65,38 @@ pub fn init(args: InitArgs) -> Init {
 
     let mut app = App::new();
 
-    app.playback.queued_changes.push(StagedChange {
-        change: PatternChange::Start {
-            bank: 0,
-            pattern: 0,
-        },
-        quantization: model::LaunchQuantization::Immediate,
-        sync_mode: model::SyncMode::PhaseLock,
-    });
+    app.ui.load_demo_on_startup = settings.display.load_demo_on_startup;
+    app.ui.demo_index = settings.display.demo_index;
+
+    if app.ui.load_demo_on_startup && !model::demos::DEMOS.is_empty() {
+        let count = model::demos::DEMOS.len();
+        let index = settings.display.demo_index % count;
+        let demo = &model::demos::DEMOS[index];
+        if let Ok(project) = model::load_str(demo.json) {
+            let playing = project.playing_patterns.clone();
+            let tempo = project.tempo;
+            app.project_state.project = project;
+            link.set_tempo(tempo);
+            for (bank, pattern) in playing {
+                app.playback.queued_changes.push(StagedChange {
+                    change: PatternChange::Start { bank, pattern },
+                    quantization: model::LaunchQuantization::Immediate,
+                    sync_mode: model::SyncMode::PhaseLock,
+                });
+            }
+            app.ui.set_status(format!("Demo: {}", demo.name));
+        }
+        app.ui.demo_index = (index + 1) % count;
+    } else {
+        app.playback.queued_changes.push(StagedChange {
+            change: PatternChange::Start {
+                bank: 0,
+                pattern: 0,
+            },
+            quantization: model::LaunchQuantization::Immediate,
+            sync_mode: model::SyncMode::PhaseLock,
+        });
+    }
 
     app.audio.config.output_device = args.output.or(settings.audio.output_device.clone());
     app.audio.config.input_device = args.input.or(settings.audio.input_device.clone());
diff --git a/src/input/options_page.rs b/src/input/options_page.rs
index 91e4e04..16f02bc 100644
--- a/src/input/options_page.rs
+++ b/src/input/options_page.rs
@@ -141,6 +141,9 @@ pub(crate) fn cycle_option_value(ctx: &mut InputContext, right: bool) {
         OptionsFocus::ResetOnboarding => {
             ctx.dispatch(AppCommand::ResetOnboarding);
         }
+        OptionsFocus::LoadDemoOnStartup => {
+            ctx.app.ui.load_demo_on_startup = !ctx.app.ui.load_demo_on_startup;
+        }
         OptionsFocus::MidiInput0
         | OptionsFocus::MidiInput1
         | OptionsFocus::MidiInput2
diff --git a/src/model/demos.rs b/src/model/demos.rs
new file mode 100644
index 0000000..76877fc
--- /dev/null
+++ b/src/model/demos.rs
@@ -0,0 +1,17 @@
+pub struct DemoEntry {
+    pub name: &'static str,
+    pub json: &'static str,
+}
+
+pub const DEMOS: &[DemoEntry] = &[
+    DemoEntry { name: "Demo 01", json: include_str!("../../demos/01.cagire") },
+    DemoEntry { name: "Demo 02", json: include_str!("../../demos/02.cagire") },
+    DemoEntry { name: "Demo 03", json: include_str!("../../demos/03.cagire") },
+    DemoEntry { name: "Demo 04", json: include_str!("../../demos/04.cagire") },
+    DemoEntry { name: "Demo 05", json: include_str!("../../demos/05.cagire") },
+    DemoEntry { name: "Demo 06", json: include_str!("../../demos/06.cagire") },
+    DemoEntry { name: "Demo 07", json: include_str!("../../demos/07.cagire") },
+    DemoEntry { name: "Demo 08", json: include_str!("../../demos/08.cagire") },
+    DemoEntry { name: "Demo 09", json: include_str!("../../demos/09.cagire") },
+    DemoEntry { name: "Demo 10", json: include_str!("../../demos/10.cagire") },
+];
diff --git a/src/model/mod.rs b/src/model/mod.rs
index 841282d..59fa8f6 100644
--- a/src/model/mod.rs
+++ b/src/model/mod.rs
@@ -1,4 +1,5 @@
 pub mod categories;
+pub mod demos;
 pub mod docs;
 pub mod onboarding;
 mod script;
@@ -8,8 +9,8 @@ pub use cagire_forth::{
     Variables, Word, WordCompile, WORDS,
 };
 pub use cagire_project::{
-    load, save, Bank, FollowUp, LaunchQuantization, Pattern, PatternSpeed, Project, SyncMode,
-    MAX_BANKS, MAX_PATTERNS,
+    load, load_str, save, Bank, FollowUp, LaunchQuantization, Pattern, PatternSpeed, Project,
+    SyncMode, MAX_BANKS, MAX_PATTERNS,
 };
 pub use script::ScriptEngine;
 
diff --git a/src/settings.rs b/src/settings.rs
index 0773bc9..3751b52 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -58,6 +58,10 @@ pub struct DisplaySettings {
     pub hue_rotation: f32,
     #[serde(default)]
     pub onboarding_dismissed: Vec<String>,
+    #[serde(default = "default_true")]
+    pub load_demo_on_startup: bool,
+    #[serde(default)]
+    pub demo_index: usize,
 }
 
 fn default_font() -> String {
@@ -105,6 +109,8 @@ impl Default for DisplaySettings {
             layout: MainLayout::default(),
             hue_rotation: 0.0,
             onboarding_dismissed: Vec::new(),
+            load_demo_on_startup: true,
+            demo_index: 0,
         }
     }
 }
diff --git a/src/state/options.rs b/src/state/options.rs
index 72e5268..b66438c 100644
--- a/src/state/options.rs
+++ b/src/state/options.rs
@@ -27,6 +27,7 @@ pub enum OptionsFocus {
     MidiInput2,
     MidiInput3,
     ResetOnboarding,
+    LoadDemoOnStartup,
 }
 
 impl CyclicEnum for OptionsFocus {
@@ -55,6 +56,7 @@ impl CyclicEnum for OptionsFocus {
         Self::MidiInput2,
         Self::MidiInput3,
         Self::ResetOnboarding,
+        Self::LoadDemoOnStartup,
     ];
 }
 
@@ -77,6 +79,7 @@ const STANDALONE_ONLY: &[OptionsFocus] = &[
     OptionsFocus::MidiInput2,
     OptionsFocus::MidiInput3,
     OptionsFocus::ResetOnboarding,
+    OptionsFocus::LoadDemoOnStartup,
 ];
 
 /// Section layout: header line, divider line, then option lines.
@@ -113,6 +116,7 @@ const FULL_LAYOUT: &[(OptionsFocus, usize)] = &[
     (OptionsFocus::MidiInput3, 39),
     // blank=40, ONBOARDING header=41, divider=42
     (OptionsFocus::ResetOnboarding, 43),
+    (OptionsFocus::LoadDemoOnStartup, 44),
 ];
 
 impl OptionsFocus {
diff --git a/src/state/ui.rs b/src/state/ui.rs
index a18e458..a00a8d3 100644
--- a/src/state/ui.rs
+++ b/src/state/ui.rs
@@ -79,6 +79,8 @@ pub struct UiState {
     pub zoom_factor: f32,
     pub window_width: u32,
     pub window_height: u32,
+    pub load_demo_on_startup: bool,
+    pub demo_index: usize,
 }
 
 impl Default for UiState {
@@ -127,6 +129,8 @@ impl Default for UiState {
             zoom_factor: 1.5,
             window_width: 1200,
             window_height: 800,
+            load_demo_on_startup: true,
+            demo_index: 0,
         }
     }
 }
diff --git a/src/views/options_view.rs b/src/views/options_view.rs
index a5dc27f..d112c9b 100644
--- a/src/views/options_view.rs
+++ b/src/views/options_view.rs
@@ -249,6 +249,12 @@ pub fn render(frame: &mut Frame, app: &App, link: &LinkState, area: Rect) {
                 focus == OptionsFocus::ResetOnboarding,
                 &theme,
             ),
+            render_option_line(
+                "Demo on startup",
+                if app.ui.load_demo_on_startup { "On" } else { "Off" },
+                focus == OptionsFocus::LoadDemoOnStartup,
+                &theme,
+            ),
         ]);
     }
 
@@ -358,6 +364,7 @@ fn option_description(focus: OptionsFocus) -> Option<&'static str> {
         OptionsFocus::MidiInput2 => Some("MIDI input device for channel group 3"),
         OptionsFocus::MidiInput3 => Some("MIDI input device for channel group 4"),
         OptionsFocus::ResetOnboarding => Some("Re-enable all dismissed guide popups"),
+        OptionsFocus::LoadDemoOnStartup => Some("Load a rotating demo song on fresh startup"),
     }
 }
 
diff --git a/src/views/patterns_view.rs b/src/views/patterns_view.rs
index 155f0d6..202e460 100644
--- a/src/views/patterns_view.rs
+++ b/src/views/patterns_view.rs
@@ -559,6 +559,9 @@ fn render_mini_tile_grid(
     let row_gap: u16 = 1;
     let max_tile_height: u16 = 4;
 
+    let max_rows = (area.height as usize + row_gap as usize) / (1 + row_gap as usize);
+    let num_rows = num_rows.min(max_rows.max(1));
+
     let available_for_rows =
         area.height.saturating_sub((num_rows.saturating_sub(1) as u16) * row_gap);
     let tile_height = (available_for_rows / num_rows as u16).min(max_tile_height).max(1);
diff --git a/tests/forth/arithmetic.rs b/tests/forth/arithmetic.rs
index 70d465c..f3e6bd1 100644
--- a/tests/forth/arithmetic.rs
+++ b/tests/forth/arithmetic.rs
@@ -210,3 +210,47 @@ fn shorthand_float() {
 fn shorthand_float_negative() {
     expect_float("-.5 1 +", 0.5);
 }
+
+// linmap
+
+#[test]
+fn linmap_basic() {
+    expect_float("64 0 127 200 2000 linmap", 200.0 + (64.0 / 127.0) * 1800.0);
+}
+
+#[test]
+fn linmap_at_bounds() {
+    expect_float("0 0 127 200 2000 linmap", 200.0);
+}
+
+#[test]
+fn linmap_at_upper() {
+    expect_float("127 0 127 200 2000 linmap", 2000.0);
+}
+
+#[test]
+fn linmap_equal_input_range() {
+    expect_float("5 5 5 100 200 linmap", 100.0);
+}
+
+// expmap
+
+#[test]
+fn expmap_at_zero() {
+    expect_float("0 200 8000 expmap", 200.0);
+}
+
+#[test]
+fn expmap_at_one() {
+    expect_float("1 200 8000 expmap", 8000.0);
+}
+
+#[test]
+fn expmap_midpoint() {
+    expect_float("0.5 100 10000 expmap", 1000.0);
+}
+
+#[test]
+fn expmap_negative_bound() {
+    expect_error("0.5 -100 8000 expmap", "expmap requires positive bounds");
+}