Introduction - If you have any usage issues, please Google them yourself
Analog intersection traffic light control. The initial state of the whole red light, 5 seconds into a state of A. Status A: what the opening green light east-west direction, north-south red light. 5 seconds after the green light to destroy things, the yellow light flashes, 2 seconds later transferred to the state B. State B: N north-south traffic, north-south direction of green light, red light thing. 5 seconds after the green light to destroy the North-South, the yellow light flashes, 2 seconds later transferred to the state A.