save project

my_game.py

@@ -84,6 +84,8 @@ while True:
     for sprite in block_list:
         sprite.rect.x -= 8
         screen.blit(sprite.image, (sprite.rect.x, sprite.rect.y))
+        if sprite.rect.x < 0 - sprite.rect.width:
+            sprite.kill() 
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
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