First two pictures: http://images.clipartpanda.com/straight-train-track-Picture-27-797636.png http://images.clipartpanda.com/straight-train-track-Picture-... A

First two pictures: http://images.clipartpanda.com/straight-train-track-Picture-27-797636.png http://images.clipartpanda.com/straight-train-track-Picture-... And: https://techcrunch.com/wp-content/uploads/2010/01/picture-29-707628.png https://techcrunch.com/wp-content/uploads/2010/01/picture-29... No idea what the 3rd picture was. Processing code is here: https://blog.jgc.org/2010/01/ikea-lillabo-processing-code.html https://blog.jgc.org/2010/01/ikea-lillabo-processing-code.ht...