Two little chickadees (* Two jumpers *) Sitting on a wall. One named Peter. (* Jumper1 bows *) One named Paul. (* Jumper2 bows *) Fly away Peter. (* Jumper1 exits *) Fly away Paul. (* Jumper2 exits *) Come back Peter. (* Jumper1 re-enter *) Come back Paul. (* Jumper2 re-enter *)