Before the game commences, lay two lengths of rope, string or crepe paper, about six meters apart to make start and finish lines. The birthday child stands in front of the finish line (he or she plays the Police Officer), while the others stand behind the start line. The game begins when the Police Officer turns his/her back on the other players and shouts, "Green Light!" He/she then turns around and counts to five. While the Police Officer is counting, the other players try to run or walk quickly toward the finish line. When the Police Officer has finished counting to five he/she shouts, "Red Light!" and turns around quickly. The other players must freeze instantly. If the Police Officer catches anyone moving, that player must return to the starting line. Play continues until one of the participants crosses the line while the Police Officer's back is turned. That player then becomes the Police Officer.