Thank you Max. I continue to learn a lot from your professional scripts, even though I do not understand all of their details.

Link to negative exponents: (It is basic algebra :-)
http://www.regentsprep.org/Regents/math/algtrig/ATO1/posnegzles.htm

A couple of questions for Max and Michael:
Somehow, the latest ArchimedeanSpirals script is getting away with theta=0.
So maybe Moi is compensating??
I tried an alert message to see the result of pow, but that prevented the script from working.

The onmousemove slider generates the flashing curves, I would guess from repetitive calculations.
Maybe with some sort of onmousemove (stopped moving), the values could be purged?

- Brian