A very simple press-fit holder / base and diffuser for the pictured type of WS2812 and / or NeoPixel 8-LED ring type. Models are sized for press fit, so no need to correct hole. pin or any other perimeter settings in your Bambu Studio / Orca Slicer profiles.

To make a nice color fader / chaser effect with just a Raspberry Pi Zero and one of these LED rings, see https://github.com/kerk1v/micropython-color-wheel/tree/main