save project

snake.py

@@ -9,4 +9,5 @@ screen = pygame.display.set_mode((660,480))
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
+            # 接收到退出事件后退出程序
             exit()
             exit()
\ No newline at end of file