Every year we ship a live visualization of our merchant's sales on Black Friday. For a long time it was just a globe with arcs where each arc shows a real sale going from seller to buyer, but in the last few years we have been transforming the website into something more fun and interactive.

I found programming a pinball machine to be quite challenging. We were a team of 2 engineers and 1 artist and we worked on that project for about a month and a half. We wrote some notes on the process and put them in the desktop computer next to the pinball machine if anyone is curious about how things work.