Attached is a script for creating 3D curves, with the Frenet-Serret equations.
This script creates 3D logarithmic curves as in "The Natural 3D Spiral" by Gur Harary and Ayellet Tal.
Many other curves can be created, by changing Kappa and Tau.
A 12 page pdf information file is included.
Michaels information on Vectors and Points was essential.
The javascript is a bit slow. The code is not optimized, and is crude.

The new OffsetMultiStep script is helpful in creating circles to sweep.