diff --git a/modules/gui.py b/modules/gui.py
index 566972a..2404478 100644
--- a/modules/gui.py
+++ b/modules/gui.py
@@ -1,5 +1,6 @@
 import sys
 import random
+from typing import type_check_only
 import pygame as pg
 from modules.agente import Agente
 from modules.mapa import Mapa
@@ -9,19 +10,20 @@ flags = 0
 
 
 def devolveCor(agente: Agente | None) -> tuple[int, int, int, int]:
-    match agente.estrategia:
-        case "Neutro":
-            return (255, 255, 255, 0)
-        case "Tit4Tat":
-            return (255, 255, 0, 0)
-        case "Vingativo":
-            return (255, 0, 0, 0)
-        case "Lunatico":
-            return (0, 0, 255, 0)
-        case None:
-            return (0, 0, 0, 0)
-        case _:
-            return (0, 0, 0, 0)
+    if type(agente) is None:
+        return (0, 0, 0, 0)
+    else:
+        match agente.estrategia:
+            case "Neutro":
+                return (255, 255, 255, 0)
+            case "Tit4Tat":
+                return (255, 255, 0, 0)
+            case "Vingativo":
+                return (255, 0, 0, 0)
+            case "Lunatico":
+                return (0, 0, 255, 0)
+            case _:
+                return (0, 0, 0, 0)
 
 
 def criarTabuleiro(