diff --git a/src/lexer.rs b/src/lexer.rs
index b0144a8..b1b669a 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -72,7 +72,7 @@ const SYNTAX: [Node; 14] = [
     },
     Node {
         token_type: TokenType::Keyword,
-        token_regex: Lazy::new(|| Regex::new(r"^(mut|try|catch|return|fn|let|use|cb)\b").unwrap())
+        token_regex: Lazy::new(|| Regex::new(r"^(mut|try|catch|return|fn|let|use|cb|struct|impl|for|in)\b").unwrap())
     },
     Node {
         token_type: TokenType::Identifier,
diff --git a/src/main.rs b/src/main.rs
index 643b678..7a1134e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,6 +5,7 @@ mod compile;
 use std::fs;
 use clap::Parser;
 use lexer::LexerState;
+use transpiler::Options;
 
 // Arguments for Wyst (short and long version)
 #[derive(Parser)]
@@ -24,7 +25,7 @@ fn main() {
     let file_content = fs::read_to_string(&args.file)
         .expect("Error reading file");
 
-    let transpiled_code = transpiler::transpile(file_content, 0, LexerState { line: 1, column: 0 });
+    let transpiled_code = transpiler::transpile(file_content, 0, LexerState { line: 1, column: 0 }, Options::default());
 
     match args.rust {
         Some(ref rust_file_name) => {
diff --git a/src/parser.rs b/src/parser.rs
index 419211c..11b4e07 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -6,6 +6,7 @@ use once_cell::sync::Lazy;
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum AstType {
     FunctionDeceleration,
+    StructDeceleration,
     VoidFunctionDeceleration,
     VariableDeceleration,
     PointerDeceleration,
@@ -78,6 +79,11 @@ impl Parser {
             ast_res.tokens.push(self.tokens[index].clone());
             ast_res.tokens.push(self.tokens[index+2].clone());
             self.index += 2;
+        } else if self.tokens.len()-index > 2 && self.tokens[index].value == "struct" && self.tokens[index+1].token_type==TokenType::Identifier && self.tokens[index+2].token_type==TokenType::Curly {
+            ast_res.tokens.push(self.tokens[index+1].clone());
+            ast_res.tokens.push(self.tokens[index+2].clone());
+            ast_res.ast_type = AstType::StructDeceleration;
+            self.index += 2;
         } else {
             match token.token_type {
                 TokenType::Identifier => {
diff --git a/src/transpiler.rs b/src/transpiler.rs
index fb4d800..6c6ebde 100644
--- a/src/transpiler.rs
+++ b/src/transpiler.rs
@@ -1,7 +1,18 @@
 use crate::lexer::{lex, LexerState, TokenType};
 use crate::parser::{Ast, AstType, Parser};
 
-pub fn transpile(input: String, indent: u32, state: LexerState) -> String {
+#[derive(Debug, PartialEq, Clone, Copy)]
+pub struct Options {
+    auto_mut: bool
+}
+
+impl Default for Options {
+    fn default() -> Options {
+        Options { auto_mut: true }
+    }
+}
+
+pub fn transpile(input: String, indent: u32, state: LexerState, options: Options) -> String {
     let mut result = String::new();
     
     if indent == 0 {
@@ -35,7 +46,8 @@ pub fn transpile(input: String, indent: u32, state: LexerState) -> String {
                             LexerState {
                                 line: ast.tokens[3].line,
                                 column: ast.tokens[3].column
-                            }
+                            },
+                            options
                         )
                     )
                     .as_str();
@@ -53,13 +65,32 @@ pub fn transpile(input: String, indent: u32, state: LexerState) -> String {
                             LexerState {
                                 line: ast.tokens[3].line,
                                 column: ast.tokens[3].column
-                            }
+                            },
+                            options.clone()
                         )
                     )
                     .as_str();
+                } else if ast.ast_type == AstType::StructDeceleration {
+                    result += format!(
+                        "struct {} {} {}",
+                        ast.tokens[0].value,
+                        "{\n",
+                        transpile_round(
+                            ast.tokens[1].value.clone(),
+                            LexerState {
+                                line: ast.tokens[1].line,
+                                column: ast.tokens[1].column
+                            }
+                        ).trim_end()
+                    ).replace("\n", ("\n".to_string() + " ".repeat(((indent+1) as usize)*2).as_str()).as_str())
+                    .as_str();
+                    result += "\n}\n";
                 } else if ast.ast_type == AstType::VariableDeceleration {
-                    result += format!("let mut {}: {}", ast.tokens[1].value, ast.tokens[0].value).as_str();
-                    // result += format!("let {}: {}", ast.tokens[1].value, ast.tokens[0].value).as_str();
+                    if options.auto_mut {
+                        result += format!("let mut {}: {}", ast.tokens[1].value, ast.tokens[0].value).as_str();
+                    } else {
+                        result += format!("let {}: {}", ast.tokens[1].value, ast.tokens[0].value).as_str();
+                    }
                 } else if ast.ast_type == AstType::MutVariableDeceleration {
                     result += format!("let mut {}: {}", ast.tokens[1].value, ast.tokens[0].value).as_str();
                 } else if ast.tokens.len() == 1 && ast.tokens[0].token_type == TokenType::Round {