I played with this one a bit in GIMP. The ‘windows’ were not part of the original fractal.
Today’s Gratitude Item: Realising that it is possible to get repl.it to do what I want it to do (ie: have a number of files in one place and specify which file should be run when the ‘run’ button is pushed). Next job is to work out version control / git integration. It’s an adventure where once again, things are probably harder than they need to be.