Initially I was interested in the layering of the transparent gray squares as they were transformed by moving the slider. Adding the white and blue squares resulted in varied conditions of overlapping.
This 3D model shows a comparison between the election in 2004 and the current election.
image - the article where I found the image is titled “grafitti, by Herzog & deMuron” - the site also has a section that is called “surfaces” - http://www.eikongraphia.com/?p=1050
I found an article on perforated metal, the architectural qualities you can get from perf metal, including phenomena resulting from multiple layers of metal skins, worth skimming- http://www.architectureweek.com/2006/0920/building_1-1.html