save project

snake.py

 import pygame
-
+from pygame import locals
 # 初始化pygame，为使用pygame做准备
 pygame.init()
 
 # 创建一个窗口
 screen = pygame.display.set_mode((600,480))
+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:
+            exit()