Click on the screen to see the optical illusion.
I did all graphics in Inkscape. Fonts created at http://www.myscriptfont.com/de/about.html Music: "Waltz for Piano" by Johannes Brahms (1833-1897) Public Domain mutopiaproject.org Inspired by a video, which I saw somewhere on the web. Here's another project about the grey bar illusion: https://scratch.mit.edu/projects/789187/
