My entry to VCP-40
The Prism Rainbow is fed by the Energy VCO, and modulated by Stages and Octasource.
There’s a piano like voice from the FM-OP VCO with heavy use of delay through Chronoblob2.
Both voices are sequenced by Entropia and the Addr-Seq provides transposing for Energy.
The bass drone is provided by the Saws VCO through the Stairway filter, and there’s a noise based percussive voice sequenced by uGraph.
The Rainbow is a difficult beast to tame. To say that I understand it would be the overstatement of the year 
You will find the patch here: https://patchstorage.com/somewhere-inside-the-rainbow/