diff --git a/evaluator.py b/evaluator.py
new file mode 100644
index 0000000..0c71648
--- /dev/null
+++ b/evaluator.py
@@ -0,0 +1,116 @@
+from typing import List, Optional
+from position import Node
+import parsed
+
+class Value:
+    pass
+
+class Int(Value):
+    def __init__(self, value: int) -> None:
+        super().__init__()
+        self.value = value
+
+class Char(Value):
+    def __init__(self, value: str) -> None:
+        super().__init__()
+        self.value = value
+
+class String(Value):
+    def __init__(self, value: str) -> None:
+        super().__init__()
+        self.value = value
+
+class Bool(Value):
+    def __init__(self, value: bool) -> None:
+        super().__init__()
+        self.value = value
+
+class EvalResult:
+    pass
+
+class ValueResult(EvalResult):
+    def __init__(self, value: Value) -> None:
+        super().__init__()
+        self.value = value
+
+class ReturnResult(EvalResult):
+    def __init__(self, value: Optional[Value]) -> None:
+        super().__init__()
+        self.value = value
+
+class BreakResult(EvalResult):
+    def __init__(self, value: Optional[Value]) -> None:
+        super().__init__()
+        self.value = value
+
+class ContinueResult(EvalResult):
+    def __init__(self, value: Optional[Value]) -> None:
+        super().__init__()
+        self.value = value
+
+class Evaluator:
+    def __init__(self) -> None:
+        pass
+
+    def evaluate(self, ast: List[Node[parsed.Expr]]) -> None:
+        for node in ast:
+            self.eval_expr(node)
+
+    def eval_expr(self, node: Node[parsed.Expr]) -> EvalResult:
+        if node.value is parsed.ExprError:
+            raise NotImplementedError()
+        elif node.value is parsed.Id:
+            raise NotImplementedError()
+        elif node.value is parsed.Int:
+            raise NotImplementedError()
+        elif node.value is parsed.Char:
+            raise NotImplementedError()
+        elif node.value is parsed.String:
+            raise NotImplementedError()
+        elif node.value is parsed.Bool:
+            raise NotImplementedError()
+        elif node.value is parsed.Unit:
+            raise NotImplementedError()
+        elif node.value is parsed.Tuple:
+            raise NotImplementedError()
+        elif node.value is parsed.Block:
+            raise NotImplementedError()
+        elif node.value is parsed.Lambda:
+            raise NotImplementedError()
+        elif node.value is parsed.If:
+            raise NotImplementedError()
+        elif node.value is parsed.Match:
+            raise NotImplementedError()
+        elif node.value is parsed.Loop:
+            raise NotImplementedError()
+        elif node.value is parsed.While:
+            raise NotImplementedError()
+        elif node.value is parsed.For:
+            raise NotImplementedError()
+        elif node.value is parsed.StructMember:
+            raise NotImplementedError()
+        elif node.value is parsed.TupleMember:
+            raise NotImplementedError()
+        elif node.value is parsed.Index:
+            raise NotImplementedError()
+        elif node.value is parsed.Call:
+            raise NotImplementedError()
+        elif node.value is parsed.Unary:
+            raise NotImplementedError()
+        elif node.value is parsed.Binary:
+            raise NotImplementedError()
+        elif node.value is parsed.Assign:
+            raise NotImplementedError()
+        elif node.value is parsed.Let:
+            raise NotImplementedError()
+        elif node.value is parsed.Function:
+            raise NotImplementedError()
+        elif node.value is parsed.Return:
+            raise NotImplementedError()
+        elif node.value is parsed.Break:
+            raise NotImplementedError()
+        elif node.value is parsed.Continue:
+            raise NotImplementedError()
+        else:
+            raise NotImplementedError()
+
diff --git a/main.py b/main.py
index cc1aa60..0259721 100644
--- a/main.py
+++ b/main.py
@@ -6,9 +6,9 @@ def main() -> None:
     text = "\"\\\"hello\\\\\""
     lexer = Lexer(text)
     parser = Parser(text, lexer)
-    parsed = parser.parse_expr()
-    print(parsed)
-
+    parsed = parser.parse()
+    for node in parsed:
+        print(node)
 
 if __name__ == "__main__":
     main()