Either inside a printed box or frame, and the colors are layered on top of each other and only visible when light shines through them, doesn’t have to be dark but looks awesome when it is Motives are interchangeable 👌 is there one you’d like to see? I can give it a trial https://video.nostr.build/3714bd993ba553801a24bce22aa0e91baec881515fcff63643ce23a7bf6fb0a7.mp4 
Discussion
Wow I love it. Here's an image... 
It’s doable you mentioned bitcoin fractals, what do I have to smoke to see the connection? 😉 https://video.nostr.build/c48bbb9b34af532d7169a3afac7f9dfabf03f24a9e57b49f4a7df44597e0c4f2.mp4
Wow that's cool! So, I love fractals and I make fractals nostr:nprofile1qqs9c5rxrvyje3uxk4wtt453fxcjn0wv3czawguvcefaa86xtmtflygpp4mhxue69uhkummn9ekx7mqpzemhxue69uhhyetvv9ujumn0wd68ytnzv9hxgqguwaehxw309ahx7um5wghxy6t5vdhkjmn9wgh8xmmrd9skcx3pp8d. Separately I named my Bitcoin show "Fractal Bitcoin" because the positive effects of Bitcoin permeate reality like a fractal. 😉 OH YEAH!
The tiny details probably won’t come out good enough