diff --git a/tests/test_parser.py b/tests/test_parser.py
index 95723e3..6482441 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -47,3 +47,7 @@ def test_parsing_text(pattern: str):
 )
 def test_pcs(pattern: str, expected: list):
     assert parse_expression(pattern).pcs() == expected
+
+# TODO: Add tests for octaves
+#        ("__6 _0 _1 _2 _3 _4 _5 _6 0 1 2 3 4 5 6 ^0 ^1 ^2 ^3 ^4 ^5 ^6 ^^0", [-2, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2]),
+#        ("_ 1 _2 <3>3 ^^4", [-1,-2,3,-1]),
diff --git a/ziffers/classes.py b/ziffers/classes.py
index bf1b197..01f3233 100644
--- a/ziffers/classes.py
+++ b/ziffers/classes.py
@@ -1,7 +1,9 @@
 from dataclasses import dataclass, field
 import operator
 from typing import Any
-
+import random
+from .defaults import DEFAULT_OPTIONS
+import itertools
 
 @dataclass
 class Meta:
@@ -12,7 +14,13 @@ class Meta:
         for key, value in new_values.items():
             if hasattr(self, key):
                 setattr(self, key, value)
-
+    
+    def update_new(self, new_values):
+        """Updates new attributes from dict"""
+        for key, value in new_values.items():
+            if hasattr(self, key):
+                if getattr(self,key) == None:
+                    setattr(self, key, value)
 
 @dataclass
 class Item(Meta):
@@ -25,33 +33,39 @@ class Item(Meta):
 class Whitespace(Item):
     """Class for whitespace"""
 
+    item_type: str = None
+
 
 @dataclass
 class DurationChange(Item):
     """Class for changing duration"""
 
-    dur: float
-
+    value: float
+    key: str = "duration"
+    item_type: str = "change"
 
 @dataclass
 class OctaveChange(Item):
     """Class for changing octave"""
 
-    oct: int
+    value: int
+    key: str = "octave"
+    item_type: str = "change"
 
 
 @dataclass
 class OctaveMod(Item):
     """Class for modifying octave"""
 
-    oct: int
-
+    value: int
+    key: str = "octave"
+    item_type: str = "add"
 
 @dataclass
 class Event(Item):
     """Abstract class for events with duration"""
 
-    dur: float = None
+    duration: float = None
 
 
 @dataclass
@@ -59,8 +73,8 @@ class Pitch(Event):
     """Class for pitch in time"""
 
     pc: int = None
-    dur: float = None
-    oct: int = None
+    duration: float = None
+    octave: int = None
 
 
 @dataclass
@@ -90,37 +104,32 @@ class Function(Event):
 
     run: str = None
 
-
-class dataclass_property(property):  # pylint: disable=invalid-name
-    """Hack for dataclass setters"""
-
-    def __set__(self, __obj: Any, __value: Any) -> None:
-        if isinstance(__value, self.__class__):
-            return None
-        return super().__set__(__obj, __value)
-
-
 @dataclass
 class Sequence(Meta):
     """Class for sequences of items"""
 
     values: list[Item]
-    text: str = field(init=False)
-    _text: str = field(default=None, init=False, repr=False)
-
-    @dataclass_property
-    def text(self) -> str:
-        return self._text
-
-    @text.setter
-    def text(self, text: str) -> None:
-        self._text = text
-
+    text: str = None
     wrap_start: str = field(default=None, repr=False)
     wrap_end: str = field(default=None, repr=False)
+    local_index: int = 0
 
     def __post_init__(self):
         self.text = self.collect_text()
+        # TODO: Filter out whitespace if not needed?
+        # self.values = list(filter(lambda elm: not isinstance(elm, Whitespace), self.values))
+
+    def __iter__(self):
+        return self
+    
+    def __next__(self):
+        if self.local_index<len(self.values):
+            next_item = self.values[self.local_index]
+            self.local_index += 1
+            return next_item
+        else:
+            self.local_index = 0
+            raise StopIteration
 
     def update_values(self, new_values):
         """Update value attributes from dict"""
@@ -137,16 +146,6 @@ class Sequence(Meta):
             text = text + self.wrap_end
         return text
 
-    def pcs(self) -> list[int]:
-        return [val.pc for val in self.values if type(val) is Pitch]
-
-    def durations(self) -> list[float]:
-        return [val.dur for val in self.values if type(val) is Pitch]
-
-    def pairs(self) -> list[tuple]:
-        return [(val.pc, val.dur) for val in self.values if type(val) is Pitch]
-
-
 @dataclass
 class ListSequence(Sequence):
     """Class for Ziffers list sequences"""
@@ -182,7 +181,13 @@ class Cyclic(Sequence):
     def __post_init__(self):
         super().__post_init__()
         # TODO: Do spaced need to be filtered out?
-        self.values = [val for val in self.values if type(val) != Item]
+        self.values = [val for val in self.values if isinstance(val,Whitespace)]
+
+    def value(self):
+        return self.values[self.cycle]
+
+    def next_cycle(self, cycle: int):
+        self.cycle = self.cycle+1
 
 
 @dataclass
@@ -192,13 +197,22 @@ class RandomInteger(Item):
     min: int
     max: int
 
+    def __post_init__(self):
+        if self.min>self.max:
+            new_max = self.min
+            self.min = self.max
+            self.max = new_max
+
+    def value(self):
+        return random.randint(self.min,self.max)
+
 
 @dataclass
 class Range(Item):
     """Class for range"""
 
-    start: int
-    end: int
+    start: int = None
+    end: int = None
 
 
 ops = {
@@ -281,3 +295,58 @@ class RepeatedSequence(Sequence):
     repeats: Item = None
     wrap_start: str = field(default="[:", repr=False)
     wrap_end: str = field(default=":]", repr=False)
+
+@dataclass
+class Ziffers(Meta):
+    """Main class for holding options and the current state"""
+
+    sequence: Sequence
+    options: dict  = field(default_factory=DEFAULT_OPTIONS)
+    loop_i: int = 0
+    current: Item = None
+    it: iter = None
+
+    def __post_init__(self):
+        self.it = iter(self.sequence)
+
+    def __iter__(self):
+        return self
+    
+    def __next__(self):
+        try:
+            self.current = next(self.it)
+
+            # Skip whitespace and collect duration & octave changes  
+            while isinstance(self.current,(Whitespace,DurationChange,OctaveChange,OctaveMod)):
+                if self.current.item_type == "change":
+                    self.options[self.current.key] = self.current.value
+                elif self.current.item_type == "add":
+                    self.options[self.current.key] = self.current.value
+                self.current = next(self.it)
+        
+        except StopIteration: # Start from the beginning
+            self.current = next(self.it)
+        
+        self.current.update_new(self.options)        
+        
+        self.loop_i += 1
+        return self.current
+
+    def take(self,num: int) -> list:
+        return list(itertools.islice(iter(self), num))
+
+    def set_defaults(self,options: dict):
+        self.options = DEFAULT_OPTIONS | options
+
+    # TODO: Handle options and generated values
+    def pcs(self) -> list[int]:
+        return [val.pc for val in self.sequence.values if isinstance(val,Pitch)]
+
+    def durations(self) -> list[float]:
+        return [val.dur for val in self.sequence.values if isinstance(val,Pitch)]
+
+    def pairs(self) -> list[tuple]:
+        return [(val.pc,val.dur) for val in self.sequence.values if isinstance(val,Pitch)]
+
+    def octaves(self) -> list[int]:
+        return [val.octave for val in self.sequence.values if isinstance(val,Pitch)]
\ No newline at end of file
diff --git a/ziffers/defaults.py b/ziffers/defaults.py
index fb0e24d..9545711 100644
--- a/ziffers/defaults.py
+++ b/ziffers/defaults.py
@@ -35,3 +35,8 @@ DEFAULT_DURS = {
     "o": 8 / 1920,  # ~0.00416
     "z": 0.0,  # 0
 }
+
+DEFAULT_OPTIONS = {
+  "octave": 0,
+  "duration": 0.25
+}
\ No newline at end of file
diff --git a/ziffers/mapper.py b/ziffers/mapper.py
index 74e5d95..66447da 100644
--- a/ziffers/mapper.py
+++ b/ziffers/mapper.py
@@ -7,7 +7,8 @@ import operator
 
 class ZiffersTransformer(Transformer):
     def start(self, items):
-        return Sequence(values=items[0])
+        seq = Sequence(values=items[0])
+        return Ziffers(sequence=seq,options={})
 
     def sequence(self, items):
         return flatten(items)
@@ -41,26 +42,26 @@ class ZiffersTransformer(Transformer):
 
     def oct_change(self, s):
         octave = s[0]
-        return [OctaveChange(oct=octave["oct"], text=octave["text"]), s[1]]
+        return [OctaveChange(value=octave["octave"], text=octave["text"]), s[1]]
 
     def oct_mod(self, s):
         octave = s[0]
-        return [OctaveMod(oct=octave["oct"], text=octave["text"]), s[1]]
+        return [OctaveMod(value=octave["octave"], text=octave["text"]), s[1]]
 
     def escaped_octave(self, s):
         value = s[0][1:-1]
-        return {"oct": int(value), "text": s[0].value}
+        return {"octave": int(value), "text": s[0].value}
 
     def octave(self, s):
         value = sum([1 if char == "^" else -1 for char in s[0].value])
-        return {"oct": value, "text": s[0].value}
+        return {"octave": value, "text": s[0].value}
 
     def chord(self, s):
         return Chord(pcs=s, text="".join([val.text for val in s]))
 
     def dur_change(self, s):
         durs = s[0]
-        return DurationChange(dur=durs[1], text=durs[0])
+        return DurationChange(value=durs[1], text=durs[0])
 
     def char_change(self, s):
         chars = ""
@@ -94,7 +95,7 @@ class ZiffersTransformer(Transformer):
     def duration_chars(self, s):
         durations = [val[1] for val in s]
         characters = "".join([val[0] for val in s])
-        return {"dur": sum(durations), "text": characters}
+        return {"duration": sum(durations), "text": characters}
 
     def dotted_dur(self, s):
         key = s[0]
@@ -106,7 +107,7 @@ class ZiffersTransformer(Transformer):
 
     def decimal(self, s):
         val = s[0]
-        return {"dur": float(val), "text": val.value}
+        return {"duration": float(val), "text": val.value}
 
     def dot(self, s):
         return "."
diff --git a/ziffers/parser.py b/ziffers/parser.py
index e3dfe50..4176de2 100644
--- a/ziffers/parser.py
+++ b/ziffers/parser.py
@@ -14,7 +14,45 @@ ziffers_parser = Lark.open(
     transformer=ZiffersTransformer(),
 )
 
-
 def parse_expression(expr: str):
     """Parse an expression using the Ziffers parser"""
     return ziffers_parser.parse(expr)
+
+def zparse(expr: str, opts: dict=None):
+    parsed = parse_expression(expr)
+    if opts:
+        parsed.set_defaults(opts)
+    return parsed
+
+def z0(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z1(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+    
+def z2(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+    
+def z3(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z3(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z4(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z5(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z6(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z7(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z8(expr: str, opts: dict=None):
+    return zparse(expr,opts)
+
+def z9(expr: str, opts: dict=None):
+    return zparse(expr,opts)
\ No newline at end of file