路口分主干和支干道，主干道的绿灯时间（为２５秒）长红灯时间短（为２０秒），支干道的红灯时间长（为３０秒）绿灯时间短（为１５秒），黄灯时间相等（为５秒）！

用P1口控制红绿灯，用P0和P2显示时间！

程序还没有优化，还望各位老师多多指点！

-junction trunk and branch-trunk Road green time (for 25 seconds) long red light a short time (20 seconds), Support corridors in the red a long time (30 seconds) green short time (15 seconds), the yellow light time equivalent (for five seconds)! I used to control traffic lights P1, P2 and P0 with show time! No optimization procedures, but also hope to instruct the teacher!