一个实用的交通灯模拟设计-a practical design simulation of traffic lights

主干绿灯50秒，红灯30s，黄5s；eda软件源程序编写，通过语句实现交通灯控制-The main light for 50 seconds, and red 30s, yellow 5S EDA software source program, through the statement to achieve control of traffic lights