What is the train-stop signal given by a person in the event of a forced stop of a vehicle at a railway crossing or other danger?

• 1A circular movement of the arm with a piece of bright cloth or any clearly visible object in daylight hours, and in the hours of darkness and in conditions of reduced visibility — with a torch or lantern.
• 2Hand gestures with a piece of bright fabric or any clearly visible object during daylight hours, during hours of darkness and in conditions of reduced visibility — with a torch or lantern.
• 3Both answers are correct.