说明：东西向绿灯亮若干秒，黄

灯闪烁 5 次后红灯亮， 红灯亮后，南

北向由红灯变为绿灯，若干秒后南北

向黄灯闪烁 5 此后变红灯，东西向变

绿灯，如此重复。-Descr iption: something to a few seconds the green light, yellow light flashes 5 times the red light, red light after red light into green light from the north-south, north and south after a few seconds then change to the yellow light flashes red 5, green things to change, Repeat.