Description: Example realize the control of traffic lights with LED lights that show the traffic status, and paragraph 7 of the current state of digital tube display the number of seconds remaining. Trunk road when the green light, red light sticks roads, on the contrary still, the two alternating current permit, trunk release per 35 seconds, each route clearance teams and 25 seconds. Every time the green light to red light by the process, the yellow light as the excessive yellow light time was 5 seconds.
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