此程序调用延时子程序的方式模拟交通灯，先红灯亮10秒，接着黄灯亮三秒，然后绿灯再亮10秒，依次循环-This program calls a subroutine delay simulate traffic lights, the first red light for 10 seconds, then yellow light for three seconds, then green and then light for 10 seconds, followed by cycle