def chime(self, dt=0):
        if self.lives:
            next(self.chimes).play()
            self.chime_time = max(self.chime_time - dt * 0.01, self.MIN_CHIME_TIME)
            if not self.world[Asteroid].entities:
                self.start_level()
            self.world.clock.schedule_once(self.chime, self.chime_time)
Play tension building chime sounds
dataset/ETHPy150Open caseman/grease/examples/blasteroids3.py/GameSystem.chime