Add a new scene, returns Scene ID

def add_scene(self, animation_id, name, color, velocity, config):
        """Add a new scene, returns Scene ID"""
        # check arguments
        if animation_id < 0 or animation_id >= len(self.state.animationClasses):
            err_msg = "Requested to register scene with invalid Animation ID. Out of range."
            logging.info(err_msg)
            return(False, 0, err_msg)
        if self.state.animationClasses[animation_id].check_config(config) is False:
            err_msg = "Requested to register scene with invalid configuration."
            logging.info(err_msg)
            return(False, 0, err_msg)
        self.state.sceneIdCtr += 1
        self.state.scenes[self.state.sceneIdCtr] = Scene(animation_id, name, color, velocity, config)
        sequence_number = self.zmq_publisher.publish_scene_add(self.state.sceneIdCtr, animation_id, name, color, velocity, config)
        logging.debug("Registered new scene.")

        # set this scene as active scene if none is configured yet
        if self.state.activeSceneId is None:
            self.set_scene_active(self.state.sceneIdCtr)
        return (True, sequence_number, "OK")