典型的棋盘覆盖算法。具有研究和学习经典算法的作用，可直接运行处结果。-a typical method of qi pan cover. This is the code can be calculate rightly and safely. And it has a sence of reserching.

Just useless project. Do not download it. It has no any sence

Capacitive touch which sence buttons touched then led must glow .