文件名称:trafficlight
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乡村小路交叉大路的交通灯程序
说明：小路有传感器p1.0，有车时，两路按照时间交换红绿灯，无车时，大路一直绿灯，小路绿灯时，若
无车立即向小路红灯、大路绿灯转换。-A rural road cross the road of traffic light program
Descr iption: path have sensor p1.0, car, two way in accordance with the time exchange traffic lights, no car, the road has been the green, green light path, if
Car free immediately to the road, the road red light green light conversion.
说明：小路有传感器p1.0，有车时，两路按照时间交换红绿灯，无车时，大路一直绿灯，小路绿灯时，若
无车立即向小路红灯、大路绿灯转换。-A rural road cross the road of traffic light program
Descr iption: path have sensor p1.0, car, two way in accordance with the time exchange traffic lights, no car, the road has been the green, green light path, if
Car free immediately to the road, the road red light green light conversion.
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