Spiral fractal based on an affine IFS

A spiral fractal generated using an affine iterated functional system described on the Yale website
http://classes.yale.edu/fractals/labs/SpiralsLab/SpiralsLab.html .
It's really a 2D fractal but I use a box-shaped initiator and show the iterations progressing upward in the third dimension.
Printed on a Form1+ at Centre College in association with a course on chaotic dynamics and fractal geometry.