diff --git a/error.py b/error.py
index df8a47f..3c39f21 100644
--- a/error.py
+++ b/error.py
@@ -1,8 +1,9 @@
 from console import console
 from sys import exit
+from typing import Union
 
 
-def traceback(code: str, error_type: str, error_message: str, line: int | None = None, start_column: int | None = None, end_column: int | None = None):
+def traceback(code: str, error_type: str, error_message: str, line: Union[int, None] = None, start_column: Union[int, None] = None, end_column: Union[int, None] = None):
 	if line != None:
 		console.print(f"[bold red]{error_type} on line {line}: [/]{error_message}\n")
 		lines = code.split("\n")[line-1:line+2]
diff --git a/main.py b/main.py
index dadc5ef..151f52d 100644
--- a/main.py
+++ b/main.py
@@ -1,40 +1,40 @@
-from tokenizer import tokenize
-from ground_ast import generate_ast
-from rich import print
-from time import time
-from generators import x86_64
-from os import system, remove
-from error import traceback
-
-
-def main():
-	in_path = "test2.grnd"
-	out_path = "out"
-	arch = "x86_64"
-
-	start = time()
-	file = open(in_path, "r")
-	code = file.read()
-	file.close()
-
-	tokens = tokenize(code)
-	ast = generate_ast(tokens, code)
-	generator = None
-
-	if arch == "x86_64":
-		generator = x86_64.X86_64Generator(ast, code, out_path)
-	else:
-		traceback(code, "fatal error", f"unkown architecture \"{arch}\"")
-
-	generator.init()
-	compile_time = time()-start
-	print(f"Compiled in {round(compile_time, 1)} seconds.")
-
-	system(f"nasm -felf64 {out_path}.asm")
-	system(f"ld -o {out_path} {out_path}.o -m elf_{arch}")
-	remove(out_path + ".o")
-	#remove(out_path + ".asm")
-
-
-if __name__ == "__main__":
-	main()
\ No newline at end of file
+from tokenizer import tokenize
+from ground_ast import generate_ast
+from rich import print
+from time import time
+from generators import x86_64
+from os import system, remove
+from error import traceback
+
+
+def main():
+	in_path = "test2.grnd"
+	out_path = "out"
+	arch = "x86_64"
+
+	start = time()
+	file = open(in_path, "r")
+	code = file.read()
+	file.close()
+
+	tokens = tokenize(code)
+	ast = generate_ast(tokens, code)
+	generator = None
+
+	if arch == "x86_64":
+		generator = x86_64.X86_64Generator(ast, code, out_path)
+	else:
+		traceback(code, "fatal error", f"unkown architecture \"{arch}\"")
+
+	generator.init()
+	compile_time = time()-start
+	print(f"Compiled in {round(compile_time, 1)} seconds.")
+
+	system(f"nasm -felf64 {out_path}.asm")
+	system(f"ld -arch elf_{arch} -o {out_path} {out_path}.o")
+	remove(out_path + ".o")
+	#remove(out_path + ".asm")
+
+
+if __name__ == "__main__":
+	main()