Tip for author: you can drastically reduce hardware & software complexity of this project by removing the Arduino and use this library which allows controlling

Tip for author: you can drastically reduce hardware & software complexity of this project by removing the Arduino and use this library which allows controlling WS281x strips directly from your Raspberry Pi: https://github.com/jgarff/rpi_ws281x https://github.com/jgarff/rpi_ws281x I use it myself on a Pi 4 to control a WS2815 strip of 466 pixels on the fascia of my house, for holiday decorations.