By now, I'm using this wallpaper:
(Sorry, I can't post URL by know...)
Do you have in your attic some wallpapers of this kind? This one is good enough but the "zenwalk" tag is deprecated for me and is quite confusing.
Actually, I'm really bad at doing artworks so I just can't make my own, and while looking the web for this author I've read he passed away (may he RIP...)
Anyway, if you know some art galeries of this kind of design, let me know! Thanks!!