diff --git a/src/main.py b/src/main.py
index 8786c6f..bec5c7e 100644
--- a/src/main.py
+++ b/src/main.py
@@ -4,7 +4,7 @@ import random, sys
 
 args = sys.argv
 # name, -arguments
-def has_argument(args, arg):
+def has_argument(args: list[str], arg: str) -> bool:
     if len(args) > 1:
         if args[1].startswith("-"):
             for chr in args[1]:
@@ -12,9 +12,9 @@ def has_argument(args, arg):
                     return True
     return False
 
-def num2char(num) -> chr:
+def num2char(num: int) -> chr:
     return chr(num + 65)
-def char2num(char) -> int:
+def char2num(char: str) -> int:
     return ord(char) - 65
 
 posx = [0, 1, 2, 3, 4]
@@ -31,15 +31,13 @@ tl.speed(0)
 
 
 #funções
-def linhax(x,y):
+def linhax(x: int, y: int) -> None:
     tl.up(); tl.goto(x,y)
     tl.down(); tl.goto(x+600,y)
-    pass
 
-def linhay(x,y):
+def linhay(x: int, y: int) -> None:
     tl.up(); tl.goto(x,y)
     tl.down(); tl.goto(x,y+600)
-    pass
 
 
 #radar screen