def __init__(self, screen, bg=0, **kwargs):
        """
        :param screen: The Screen being used for the Scene.
        :param bg: Optional colour for the background.

        Also see the common keyword arguments in :py:obj:`.Effect`.
        """
        super(Background, self).__init__(screen, **kwargs)
        self._bg = bg
def __init__ ( self , screen , bg = 0 , ** kwargs ) : super ( Background , self ) . __init__ ( screen , ** kwargs ) self . _bg = bg
:param screen: The Screen being used for the Scene.
        :param bg: Optional colour for the background.

        Also see the common keyword arguments in :py:obj:`.Effect`.