diff --git a/src/main.rs b/src/main.rs
index 043b1db0..4bfc8ccb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,11 @@
 mod lexer;
 mod parser;
 mod error;
-mod node;
 
 use std::fs;
 use lexer::{Lexer, Token};
-use parser::Parser;
-use parser::ast::AST;
+use crate::lexer::TokenType;
+use crate::parser::ast::create_function_ast;
 // use crate::node::function_node;
 
 fn format_tokens(tokens: &Vec<Token>) -> String {
@@ -22,6 +21,7 @@ fn format_tokens(tokens: &Vec<Token>) -> String {
     result
 }
 
+/*
 fn format_parser(parser: &Parser) -> String {
     format!(
         "{{\n  lexer: {{\n    source: {:?},\n    current: {},\n    line: {}\n  }},\n  current_token: {{\n    token_type: {:?},\n    lexeme: {:?},\n    line: {}\n  }}\n}}",
@@ -40,39 +40,22 @@ fn format_ast(ast: &AST) -> String {
         ast.nodes
     )
 }
+ */
 
 fn main() {
     let code = fs::read_to_string("test/test4.wave").expect("Failed to read the file");
 
-    // Create a Lexer
     let mut lexer = Lexer::new(code.as_str());
 
-    // Tokenize the source code
     let tokens = lexer.tokenize();
+    eprintln!("Tokens: {}", format_tokens(&tokens));
 
-    // Create a Parser
-    let mut parser = Parser::new(lexer);
-
-    // Parse the AST
-    let ast = parser.parse();
-    /*
-    let mut asta = AST::new();
-
-    let node = ASTNode::Variable {
-        name: String::from("x"),
-        var_type: String::from(":i32"),
-        value: Value::Int(42),
-        is_immutable: false,
-    };
+    let function_name = tokens.iter()
+        .find(|token| matches!(token.token_type, TokenType::IDENTIFIER(_)))
+        .map(|token| token.lexeme.clone())
+        .unwrap_or_default();
 
-    asta.add_node(node);
-    */
+    let ast = create_function_ast(function_name);
 
-    // a formalized output
-    eprintln!("Tokens: {}", format_tokens(&tokens));
-    eprintln!("\nParser: {}", format_parser(&parser));
-    eprintln!("\nAST: {}", format_ast(&ast));
-    // println!("\nTEST AST: {}", format_ast(&asta));
-    // println!("{:?}", function_node());
-    // println!("{:#?}", function_node());
+    eprintln!("AST: {:?}", &ast)
 }
\ No newline at end of file
diff --git a/src/node.rs b/src/node.rs
deleted file mode 100644
index 6ab487aa..00000000
--- a/src/node.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use std::fs;
-use crate::parser::ast::AST;
-use crate::lexer::Lexer;
-use crate::parser::Parser;
-
-pub(crate) fn function_node() {
-    let code = fs::read_to_string("test/test2.wave").expect("Failed to read the file");
-    let mut parser = Parser {
-        lexer: Lexer {
-            source: &code,
-            current: 0,
-            line: 0,
-        },
-        current_token: Default::default(),
-    };
-
-    let mut ast = AST { nodes: vec![] };
-
-    parser.function(&mut ast);
-
-    // AST에 추가된 함수 노드를 출력
-    println!("{:#?}", ast);
-}
\ No newline at end of file
diff --git a/src/parser/ast.rs b/src/parser/ast.rs
index 4ead1399..b8bfe82b 100644
--- a/src/parser/ast.rs
+++ b/src/parser/ast.rs
@@ -6,49 +6,31 @@ pub enum Value {
 
 #[derive(Debug, Clone)]
 pub enum ASTNode {
-    Function {
-        name: String,
-        params: Vec<String>,
-        body: Vec<ASTNode>,
-    },
-    Variable {
-        name: String,
-        var_type: String,
-        value: Value,
-        is_immutable: bool,
-    },
-    IfStatement {
-        condition: String,
-        body: Vec<ASTNode>,
-        else_body: Option<Vec<ASTNode>>,
-    },
-    WhileLoop {
-        condition: String,
-        body: Vec<ASTNode>,
-    },
-    ForLoop {
-        init: Box<ASTNode>,
-        condition: String,
-        increment: Box<ASTNode>,
-        body: Vec<ASTNode>,
-    },
-    Import {
-        module_name: String,
-    },
-    Print {
-        message: String,
-        newline: bool,
-    },
-    Literal {
-        value: String,
-    },
-    Expression {
-        operator: String,
-        left: Box<ASTNode>,
-        right: Box<ASTNode>,
-    },
+    Function(FunctionNode),
 }
 
+#[derive(Debug, Clone)]
+pub struct FunctionNode {
+    pub name: String,
+    pub parameters: Vec<ParameterNode>,
+    pub body: Vec<ASTNode>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ParameterNode {
+    pub name: String,
+    pub param_type: String, // For simplicity, assuming type as string.
+}
+
+pub fn create_function_ast(function_name: String) -> ASTNode {
+    ASTNode::Function(FunctionNode {
+        name: function_name,
+        parameters: vec![], // No parameters
+        body: vec![],       // Empty body
+    })
+}
+
+/*
 #[derive(Debug, Clone)]
 pub struct AST {
     pub nodes: Vec<ASTNode>,
@@ -66,3 +48,5 @@ impl AST {
         self.nodes.push(node);
     }
 }
+
+ */
\ No newline at end of file
diff --git a/src/parser/parser.rs b/src/parser/parser.rs
index 9bf027e7..36f3b832 100644
--- a/src/parser/parser.rs
+++ b/src/parser/parser.rs
@@ -1,3 +1,4 @@
+/*
 use crate::lexer::{FloatType, IntegerType, Lexer, Token, TokenType};
 use crate::parser::ast::{AST, ASTNode, Value};
 
@@ -545,3 +546,5 @@ impl<'a> Parser<'a> {
         });
     }
 }
+
+ */
\ No newline at end of file
diff --git a/test/test4.wave b/test/test4.wave
index 9e5f0bbb..c189eccf 100644
--- a/test/test4.wave
+++ b/test/test4.wave
@@ -1,3 +1 @@
-fun main() {
-    println("Hello World");
-}
\ No newline at end of file
+fun main() { }
\ No newline at end of file