def __init__(self, screen, x, y, life_time):
        """
        :param screen: The Screen being used for this particle system.
        :param x: The column (x coordinate) for the origin of this explosion.
        :param y: The line (y coordinate) for the origin of this explosion.
        :param life_time: The life time of this explosion.
        """
        super(RingExplosion, self).__init__(
            screen, x, y, 30, self._new_particle, 1, life_time)
        self._colour = randint(1, 7)
        self._acceleration = 1.0 - (1.0 / life_time)
dataset/ETHPy150Open peterbrittain/asciimatics/asciimatics/particles.py/RingExplosion.__init__/original