save project

my_game.py

@@ -21,7 +21,7 @@ while True:
             # 接收到退出事件后退出程序
             exit()
     index += 1
-    if index == 5
+    if index == 5:
         index == 1
     # 将背景图画上去
     screen.blit(background, (0, 0))