Made some modifications to this 2 year old script, which was of learning benefit back then.
The script has a lot of variables.

Roughly speaking, for 100% of a 360 degree set of curves, the new version avoids a duplicating overlap of the first and last drawn curves, by not
drawing the zero-ith curve. It will also do a percentage of a 360 degree set of curves, for example a 180 degree set of curves, including the zero-ith curve.
The default htm uses Pilou's example, with uDensity = 9, for creation of 9 curves.

Had quite a difficult time adjusting indexes.

- Brian