In 2012, I made some album art for Starring's ABCDEFG-HIJKLMNOP-QRSTUV-WXYZ (Northern Spy Records). Three years later, I designed this little interactive JS tool so that you, dear reader, could make your own op-art star patterns. A couple years later still, I ended up using this tool to design the cover art for my own Not Knowing series of artisinally time-stretched samples.
It uses dat.GUI and HTML5 Canvas.