说明：  十字路口交通灯时实控制1、要完成本实验，首先必须了解交通路灯的亮灭规律。设有一个十字路口，1、3为南，北方向， 2、4为东，西方向，初始态为4个路口的红灯全亮。 之后， 1、3路口的绿灯亮， 2、4路口的红灯亮， 1、3路口方向通车。 延迟一段时间后， 1、3路口的绿灯熄灭，而1、3路口的黄灯开始闪烁。闪烁若干次后， 1、3路口的红灯亮， 同时2、4路口的绿灯亮， 2、4路口方向开始通车。 延迟一段时间后， 2、4路口的绿灯熄灭，而黄灯开始闪烁。闪烁若干次后，再切换到1、3路口方向。 之后，重复上述过程与管理
(crossroads of traffic lights at a real control to the completion of this experiment, we must first understand the bright lights of traffic laws to eliminate. There is a crossroads, and 1,3-South, North, 2,4-East, West, the initial state of the four junctions of all-red light. After crossing the green 1,3-and 2,4-red light at the junction, the opening of 1,3 junctions direction. Some time after the delay, the green light at the junction of 1,3 out and the junction of 1,3 begin blinking yellow light. Several flashing, red lights at the junction of 1,3-and 2,4-green light at the junction, 2,4 intersection opened to traffic direction. Some time after the delay, the green light at the junction of 2,4 out and the yellow light started flashing. Several Stars and then switch to 1,3 junctions direc)