Description: crossroads of traffic lights at a real control to the completion of this experiment, we must first understand the bright lights of traffic laws to eliminate. There is a crossroads, and 1,3-South, North, 2,4-East, West, the initial state of the four junctions of all-red light. After crossing the green 1,3-and 2,4-red light at the junction, the opening of 1,3 junctions direction. Some time after the delay, the green light at the junction of 1,3 out and the junction of 1,3 begin blinking yellow light. Several flashing, red lights at the junction of 1,3-and 2,4-green light at the junction, 2,4 intersection opened to traffic direction. Some time after the delay, the green light at the junction of 2,4 out and the yellow light started flashing. Several Stars and then switch to 1,3 junctions direc
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