Introduction - If you have any usage issues, please Google them yourself
The basic state of this process simulation traffic light control, when the program starts to work, the north and south, east and west road lights are red,
For 5 s, as a buffer time.After that, things, things green light 25 s, north and south turns red, 30 s, the next thing tight,
North and south continue to ban.Later, north and south, north and south green light 25 s, something turns red, 30 s, the north and south tight, things continue
For stop.Cycling, realize the control of traffic lights.Digital tube precise display lights last time.