3D Hilbert Curve

I am a theoretical maths student at the University of Maine. These cubes that I made in Rhino are representations of the 3D Hilbert Curve concept. There are printable files of the first, second, and third iterations of the curve. As It is an infinite family of curves, I have a program that I wrote to draw the initial curves, and instructions on how to pipe them. By fiddling with the code, you can either make the initial curve out of a polyline, or 7 single lines and then joining them. The last p