Les Pounder published a tutorial on the Tom’s Hardware website on how to build a custom 3D-printed CheerLights display powered by the Raspberry Pi Pico W.
Les illuminated the pumpkin using NeoPixel and the background color is set by CheerLights. Les uses the very nimble Raspberry Pi Pico W as the controller. The code running on the controller is based on CircuitPython and is really straightforward for anyone to get started with programming microcontrollers.
The results are gorgeous, I mean scary.