基于Verilog的简易交通灯控制。//主干道绿灯亮30s，最后5秒绿灯灭黄灯亮，30s过后红灯亮起，倒数20s后绿灯亮30s，如此重复 //支干道红灯亮30s，后绿灯亮，支干道绿灯倒数20s，最后5s绿灯灭黄灯亮，20s倒数完后换红灯亮30s，如此重复-Verilog-based simple traffic light control. // Main road green light 30s, the last five seconds off the yellow light gre