Heike Weber took what I, and probably you, did in elementary school and brought it to a ridiculously larger scale. Those designs on the floor? Drawn with permanent marker. She's worked on art installations like this for more than a decade.
Don't let them deceive you with their fancy topographic buzzwords, and smartypants search algorithms. They just use these, and have people who move them really really fast as you click. Seriously. Sergey—the Ukrainian plumber who is fixing the pipes at home—told me the other day. [Dark Roasted Blend]