auto save

snake.py

@@ -4,4 +4,12 @@ import pygame
 pygame.init()
 
 # 创建一个窗口
-??
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+pygame.display.set_mode((800,600))
+
+while True:
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            sy.exit()
+
+    screen.blit(background,(0,0))
+    pygame.display.update()
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