Bottles on the Wall

import time
def bottles_on_wall(bottles):
    if bottles > 0:
        print "%s bottles of pop on the wall" % bottles
        time.sleep(1)
        print "%s bottles of pop" % bottles
        time.sleep(1)
        print "If one of those bottles should happen to fall,"
        time.sleep(3)
        bottles = bottles - 1
        print "%s bottles of pop on the wall. \n" % bottles
        time.sleep(1)
        bottles_on_wall(bottles)
    elif bottles == 0:
        print "And now we're all drunk on pop."
        return

bottles_on_wall(99)