本代码是一种游戏代码，游戏开始后，屏幕右侧的方块域会不断落下方块组合形成背景方块，游戏的任务是消除更多的背景方块。-This code is a game code, the game started, the screen box to the right field box will be combined to form the background of falling box, the game' s mission is to eliminate more background