I did two of them because I got pretty far into the top one, and realized my lighting was off.
Done with Inkscape.
Initially it wasn't necessarily going to be a neon-sign so it looked like this:
But when I adjusted it I wasn't sure I liked it with the more green-tint as the backlight so I'm putting them both up here.
They're not necessarily done either. I probably have about 3 hours on this total so far.
I could waste way more hours making slight little changes to it because just like with a painting it's never actually done. You just stop working on it.