I have admired the work of the artist Bridget Riley for a long time. She is now in her eighties, but as it seems still very creative and productive. Some of her recent work combines simple triangles in fascinating compositions. The longer I look at them, the more patterns I recognise.
Yet, the actual painting can be explained easily, in a sense of a specification document to reproduce the pattern precisely. However, seeing the real print, as I had the chance at the London Art Fair last week, and a reproduction on the screen is incommensurable.
Having said that, I could not resist programming a figure that resembles the artwork labelled Bagatelle 2. Well, at least I can say that I learned more about
gridSVG in R.
References P. Murrell. R Graphics, Second Edition. CRC Press. 2011
 P. Murrell. What’s in a Name? . The R Journal, 4(2):5–12, dec 2012.
 P. Murrell and S. Potter. gridSVG: Export grid graphics as SVG. R package 1.5-0. 2015
R version 3.2.3 (2015-12-10) Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under: OS X 10.11.2 (El Capitan) locale:  en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages:  grid stats graphics grDevices utils datasets  methods base other attached packages:  gridSVG_1.5-0 data.table_1.9.6 loaded via a namespace (and not attached):  tools_3.2.3 RJSONIO_1.3-0 chron_2.3-47 XML_3.98-1.3