Railroad Track Carpet Fractal

The Railroad Track Carpet design was made by removing four blocks from a complete sqaure in OpenScad with the coordinates [0,1], [3,1], [0,2], and [3,2].

The explanation, design process, and mathematics are presented in this blog post: https://geekhaus.com/math103_fall2017/2017/11/14/railroad-track-carpet-fractal/