Generating complex fills from array of Shapeloop loop parts

[Tezcatlipoca]

I have a running table of some different parts or "genes" from shapeloop loops:
https://docs.google.com/spreadsheets/d/ ... edit#gid=0

I want to create a random fill of a selected area in golly using a random assortment of these parts at short random intervals (near the size of the length of an average gene). The idea is to create a "genetic soup" where new and different loop structures form. The hope is that with a large enough selection there could be some stable and novel and complex loops formed this way. Does anybody have ideas on how best to go about this?

Unfortunately, a loop's code (that which you get from selecting and copying the loop) concatenated with code for another loop's code != both the loops together when you paste it back into Golly. I understand that golly doesn't see it this way, loops and complexity as entities representationally distinct, it just sees a flat grid with different states. But how best to get this behavior, how best to achieve a genetic soup from parts of shapeloop loops?