+ return self._scene.on_music_end()
+
+
+class Event:
+ """ Base class for events. """
+
+ ENGINE_METHOD = "unknown_event"
+
+ def __init__(self, *args, **kw):
+ self._args = args
+ self._kw = kw
+
+ def apply(self, engine):
+ getattr(engine, self.ENGINE_METHOD)(*self._args, **self._kw)
+
+
+class ChangeSceneEvent(Event):
+ """ Change to a new scene. """
+
+ ENGINE_METHOD = "change_scene"