I enjoy making obfuscated signatures in PostScript. The bottom of my home page reads: If your browser can preview postscript, have a look at my signature https

I enjoy making obfuscated signatures in PostScript. The bottom of my home page reads: If your browser can preview postscript, have a look at my signature https://tromp.github.io/img/sig.pdf https://tromp.github.io/img/sig.pdf : %!PS % -John Tromp http://tromp.github.io/ 42 42 scale 7 9 translate .07 setlinewidth .5 setgray/c{arc clip fill setgray}def 1 0 0 42 1 0 c 0 1 1{0 3 3 90 270 arc 0 0 6 0 -3 3 90 270 arcn 270 90 c -2 2 4{-6 moveto 0 12 rlineto}for -5 2 5{-3 exch moveto 9 0 rlineto}for stroke 0 0 3 1 1 0 c 180 rotate initclip}for showpage (when using ghostview make sure to turn off Antialias under State/gv Options or the colors won't show correctly) or this one https://tromp.github.io/img/pinwheel.pdf https://tromp.github.io/img/pinwheel.pdf : %!PS % -John Tromp http://tromp.github.io/ /t{dup 1 sub gsave dup 0 gt{[.4 .2 -.2 .4 .4 .2]concat t currentgray .8 mul .2 add setgray -1 1 scale t -1 2 translate t 1 -1 scale t[0 1 1 0 0 2]concat t pop}{0 moveto 1 0 lineto 0 2 lineto closepath clip fill}ifelse grestore}def 10 10 translate 600 600 scale 5 t showpage The first is a logo for a Go club I co-founded in my home town, while the second shows an aperiodic tiling known as the https://en.wikipedia.org/wiki/Pinwheel_tiling https://en.wikipedia.org/wiki/Pinwheel_tiling