Dynamic Scenes.
You’ve just activated a dynamic light scene created by Lamptier’s designers.
You can select the soundtracks and adjust the sound volume through the Fine Tuning menu. You can also change some of the default settings if you go to Settings -> Sounds and Animation
You can also create your own static scene from any dynamic scene by tapping “Duplicate scene” in the Fine Tuning menu - this will create a snapshot of current colours and save it for future use.