save project

my_game.py

@@ -26,10 +26,7 @@ while True:
     screen.blit(background, (0, 0))
     screen.blit(road, (0, 500))
     screen.blit(hero[index], (150, 400))
-    if index<len(hero)-1:
-        index+=1
-    else:
-        index=0
+    index=(index+1) % len(hero)
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
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