功能简单的可视化俄罗斯方块，对于编程中级者较为合适，代码有些部分还可以进行改进，比如增加窗口显示下一个图形，增加计分功能等~-Simple visual features the Russian box, the program is more suitable for intermediate, in some part of the code can also be used for improvements, such as the increase in the next window