def effect(effect_brushtype="stroke",
           effect_scale=2.5,
           effect_period=4,
           **kwargs):
    """

    :param effect_brushtype:
        The brush type for ripples. options: 'stroke' and 'fill'.
    :param effect_scale:
        The maximum zooming scale of ripples in animation.
    :param effect_period:
        The duration of animation.
    :param kwargs:
    :return:
    """
    _effect = {
        "brushType": effect_brushtype,
        "scale": effect_scale,
        "period":effect_period
    }
    return _effect