设计一个十字路口的交通灯控制器，能显示十字路口东西、南北两个方向的红、黄、绿灯的指示状态。两组红、黄、绿三种颜色的灯分别作为东西、南北两个方向的红、黄、绿灯。变化规律为：东西绿灯亮，南北红灯亮，东西黄灯亮，南北红灯亮，东西红灯亮，南北绿灯亮，东西红灯亮，南北黄灯亮，东西绿灯亮，南北红灯亮……，这样循环下去。

南北方向是主干道车到，东西方向是支干道车道，要求两条交叉道路上的车辆交替运行，主干道每次通行时间为30秒，支干道每次通行时间为20秒，时间可设置修改。

在绿灯转为红灯时，要求黄灯先亮5秒钟，才能变换运行车道。

要求交通灯控制器有复位功能，在复位信号使能的情况下能够实现交通灯的自动复位

功能，并且要求所有的交通灯的状态变化，包括复位信号引起的均发生在时钟脉冲上升沿处。

-Design a crossroads of traffic light controller, which can show things crossroads, north and south the two directions of the red, yellow, and green light the instructions of the state. Two groups of red, yellow, and green 3 kinds of color lamp, north and south as things are two directions of the red, yellow, and green. Change rule is: there is a green light, the light is red, yellow light things, the south and the red light comes on, things the red light, the south and a green light, a red light things, the south and the north yellow lights up, a green light things, the south and the red light...... And this cycle down.

The north and south direction is car trunk road, things are a trunk road lane direction for two cross cars on the road running alternately, main road traffic every time to 30 seconds, a road traffic for 20 seconds each time, time can modify Settings.

In the green light to red light, bright yellow light requirements before 5 seconds, can transform running track.

Traff