说明：  使用C语言，控制8086微机系统实现交通灯实验，绿、黄、红交替显示，绿色红色亮30s，黄色闪3s，有数码管倒计时
(The traffic light experiment is realized by using C language, and the 8086 microcomputer system is controlled. The green, yellow and red display alternately, the green red is on for 30s, the Yellow flashes for 3S, and the digital tube countdown is provided)