These is yet another script to created an cubical Brain aka 3D Hilbert curve.
Its quite clear has it has just 20 Lines of code.
Using the power of python its really easy to assemble the correct vertex set for the hilbert curve. Feel free to easily change any of the parameters like order, cross section, line distance ... and compile it again
with the power of Python-Enabled OpenSCAD.
For details, please check out:
http://www.guenther-sohler.net/openscad/