12- and 9-pointed stars
In her article A Nine- and Twelve-Pointed Star Polygon Design of the Tashkent Scrolls Lynn Bodner analyses the construction of a pattern that combines 12-pointed and 9-pointed stars as it appears in the Tashkent scrolls, with the Topkapi scrolls among the most import historical source of drawn patterns. Next applet describes how a line pattern is constructed starting from intersection points of concentric circles and radii that divide the circles into congruent sectors. Note that the result show almost regular polygons and stars. These small distortions clearly were accepted as less important than the possibility of combining different types of stars within one pattern.