auto save

snake.py

@@ -17,7 +17,8 @@ while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
-            exit()       
+            exit()
+                 
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -29,6 +30,4 @@ while True:
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
-    pygame.display.update()
-
-    
\ No newline at end of file
+    pygame.display.update()  
\ No newline at end of file