def METHOD_NAME(self, image: pygame.surface.Surface) -> None:
    iw, ih = image.get_size()
    tw, th = iw // 3, ih // 3
    self._tile_size = tw, th
    self._tiles = [
        image.subsurface((x, y, tw, th))
        for x, y in product(range(0, iw, tw), range(0, ih, th))
    ]