It is now called Svgbob[0], it was originally written in elm and I created rust implementation too, called SvgbobRus[1]. Optimization to reduced the svg size has been applied. Here is the link to previous HN submission[2].
PRs welcome.[0] https://github.com/ivanceras/svgbob
[1] https://github.com/ivanceras/svgbobrus
[2] https://news.ycombinator.com/item?id=12621680