Thresholds, after Paul Klee
In der Strömung sechs Schwellen (In the Current Six Thresholds) - Paul Klee
http://mathhombre.tumblr.com/post/127801063809/ufansius-in-der-stro-mung-sechs-schwellen-in
This is a beautiful geometric abstract. I loved the fraction and multiplicative structure so tried to make it.
My problem was the rectangles were made in a list, so were all the same color. This sketch implements a spreadsheet workaround that Simon (user slik) gave me on the forums, but there's also a javascript option worked out by Chris Rime. See the forum thread for details. Thanks to both! https://forum.geogebra.org/viewtopic.php?f=2&t=41331
More GeoGebra at bit.ly/mh-ggb