Two LED-Rings with 24 LEDs each and a rotary encoder to set the color (the color can be set individually for each ring). Running on an Attiny85 (not reccommended, just use a regular atmega).
FabianBach/Arduino_LightRings
Two LED-Rings with 24 LEDs each and a rotary encoder to set the color (the color can be set individually for each ring).
C++