Meaning of the flags.
1. Chequered flag: Signals end of race or of the practice.
2. White flag: Service vehicle on track.
3. Blue flag: (flag immobile) a car is close behind you.
4. Blue flag: (waving flag) a car is about to overtake you.
5. Yellow flag: (flag immobile) overtaking is prohibited, danger.
6. Yellow flag: (waving flag) immediate danger, slow down.
7. Red flag: (by marshals & the clerk of the race) stopping of the race on the line.
8. Green flag: end of danger,free track.
9. Yellow with red stripes: danger slippery surface.
10. Black flag: (with car number) stop on next lap.
11. Black with orange circle: your car is in danger.
12. black & white flag divided: warning to driver he has been reported for unsportsmanlike behaviour. A board with the car number is shown simutaneously.