See: https://www.instructables.com/Fiber-Optic-LED-Lamp See: https://www.instructables.com/Fiber-Optic-and-LEDs-a-Wall-Decoration I adapted the code to suit my GRBW ...

Instructables member Qttting_F has published a fantastic project detailing how to build a Water Surface Lamp, using a little Arduino coding and hardware, combined with a few LED lights to great effect ...