Choose a person to be the stoplight. Have everyone else line up on the opposite side of the gym. If "green light" is called out, the players run toward the stoplight person until they hear "red light," which means stop. Anyone that does not stop after red light is called, must start over at the beginning of the line. The activity repeats for several rounds. The first person to make it to the other side of the gym now becomes the new stoplight person.