auto save

snake.py

@@ -57,6 +57,7 @@ while True:
     if x == x1 and y == y2:
         x1 = random.randint(0,22)*30
         y2 = random.randint(0,24)*30
+    
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))