An Arduino Knight Rider Rainbow dice that uses WS2812B RGB leds

This project implements a Knight Rider / Rainbow effect Random Selector.
It uses an Arduino UNO and a WS2812B RGB led strip.
A friend of mine needs a random selector for train scale model.
I've developed this using the Arduino framework, because he would like to modify the sketch "the Arduino way".
Unluckly I have not any picture or video of his build. So I've built a dice selector by using an old clock frame. I would like to thank my friend Matteo for cutting vinyls out for this project.

This project uses the Adafruit "NeoPixel library" (https://github.com/adafruit/Adafruit_NeoPixel).
For the Knight Rider Rainbow effect I took inspiration from the technobly "NeoPixel Knight Rider" project (https://github.com/technobly/NeoPixel-KnightRider).
The circuit for this project is really simple, there is just a Start switch connected, and a WS2812B led strip.

When the user press the start switch, the  Knight Rider / Rainbow selector starts, and a semi-randomic led is choses.
After a while, a Rainbow effect starts powering on all the leds.

Code

• https://gist.github.com/davidegironi/3144efdc6d67e5df55438cc3cba613c8

Notes

• read risk disclaimer
• excuse my bad english