save project

snake.py

@@ -23,7 +23,9 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+
     x += 30
+    
     position.append((x, y))
     position.pop(0)
     screen.blit(background, (0, 0))