def METHOD_NAME(self):
    if self.fade_out is not None:
        arcade.draw_rectangle_filled(self.window.width / 2, self.window.height / 2,
                                     self.window.width, self.window.height,
                                     (0, 0, 0, self.fade_out))
    if self.fade_in is not None:
        arcade.draw_rectangle_filled(self.window.width / 2, self.window.height / 2,
                                     self.window.width, self.window.height,
                                     (0, 0, 0, self.fade_in))