交通灯的简单控制，实现了交通路口的指挥系统，但是该程序做的比较简单，功能不是很全面，和显示的交通路口的指挥有不符的地方-A simple traffic light control, to achieve the traffic at the junction of the chain of command, but the procedure is relatively simple to do, function is not very comprehensive, and display