Ok, I apologize - I don't have the device here yet, it is a procedural pattern. The red-orange-yellow-green color change indicates low-to-high heart variability, so to say, if everything is green, you are in an absolutely relaxed state.

The circles are target circles. The theory is: if the user remains his stress/relaxation state constantly (by breathing, meditating, etc.), the light-worm is circling. And the better your heart variability is, the bigger gets the circle. So, the goal is to "draw" bigger circles with your heart then the target circles. 256 is just my initialization radius ;-)

This project is no replacement, it is just another one in development for that device. "The Descent" reached now milestone 1 and when this here is done, we proceed to the next milestone.