This is just to prove that the LEDS on the Light ring are individually addressable and working.
The speed of the chasing is varied slightly in the video.
Variations of this simple theme can be used for lighting effects.
You can chase one LED, some LEDs, all LEDs, use sectors, change colours and control brightness.
You can even add various triggers such a proximity sensor.
I could even build a Solar system model with multiple rings (and motors to handle the elliptical orbits and axis offsets).