save project

snake.py

@@ -18,8 +18,9 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+    x+=30       
     # 将背景图画上去
-    screen.blit(background, (0, 0))
+    screen.blit(background, (x, y))
     # 将贪吃蛇画上去
     screen.blit(right, (240, 120))
     # 将贪吃蛇的身体画上去