auto save

snake.py

 #导入
 import pygame
+#导入locals模块
+from pygame import locals
 #初始化pygame
 pygame.init()
 #创建窗口
-screen = pygame.display.set_mode((660,480))
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+screen = pygame.display.set_mode((660,480))
+#导入图片
+pygame.image.load('bg.png')
+pygame.image.load('apple.png')
+pygame.image.load('right.png')
+#保留窗口（无限循环）
+while True:
+    #事件监听
+    for event in pygame.event.get():
+        #退出窗口
+        if event.type == locals.QUIT:
+            exit()
+    #将背景渲染到窗口上
+    pygame.surface.blit(0,0)
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