save project

snake.py

@@ -5,8 +5,11 @@ from pygame import locals
 pygame.init()
 
 # 创建一个窗口
-screen pygame.display.set_mode((660,480))
+background=pygame.image.load('bg.png')
+screen = pygame.display.set_mode((660,480))
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            exit()
\ No newline at end of file
+            exit()
+    screen.blit(background,(0,0))
+    pygame.display.update()
\ No newline at end of file