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LED-simulation-of-traffic-lights
- 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-Things to green light a number of seconds, the yellow light flashes 5 times the red light, red light, from north to south by the red light into green light for several seconds after the n