This is my dark theme for Processing. I'm not the first to do this, and I used many other tools, so here's some credit.
https://github.com/jeffThompson/DarkProcessingTheme_3.0 is the original dark theme which this is based off of.
https://www.dafont.com/font-comment.php?file=perfect_dos_vga_437 is the font used for the text editor now.
https://www.dafont.com/pacifico.font is the font used for everything else.
I hope you enjoy this!
Put the fonts in the folder (processing)\lib.
Put the preferences.txt in C:\Users\(you)\AppData\Roaming\Processing
Put the theme.txt in the lib folder in processing (or drop the lib folder in and hit replace).
Please tell me if this doesn't work!