The black and white flag in Formula 1 is used as a warning to a driver that they have been reported for unsportsmanlike behavior. The flag is divided diagonally, with a black section and a white one, and is held motionless, accompanied by a display of the driver number to identify the recipient of the warning. The black and white flag is Formula 1s official "yellow card" warning, and it should be shown once only. If a driver does not change their conduct after seeing the black and white flag, then the next stage of action will be a penalty. The black and white diagonal flag can also mean a warning to a driver for exceeding track limits.