Red light, green light is a game played mostly by children. The "it" person stands at one end of the playing field, with the rest of the players at the other end. "It" turns their back to the others and calls out "Green light!" The players then run as fast as they can towards "it". At any time, "it" can call out "Red light!" and the others must freeze in place. In anyone fails to stop, they are out. The first player to reach the person who is "it" wins and becomes "it" for the next round.