More Generalizations (Page 12)
Interesting effects can be had by using non-regular or non-convex
polygons. We need only begin with a finite number of points connected in
a closed path. In this figure, we use a 5-pointed star—the vertices of a
pentagon connected in a different order—with 20 segments on each side
and an offset of 15:

Here is a similar figure, with the offset increased
to 27:

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