'Track time changes.'

def _time_changed_cover(self, now):

    if self._requested_closing:
        self._position -= 10
    else:
        self._position += 10
    if (self._position in (100, 0, self._set_position)):
        self.stop_cover()
    self._closed = (self.current_cover_position <= 0)
    self.schedule_update_ha_state()
