sierpinski triangles - rose Phone Case

The Sierpinski triangle, also called the Sierpinski gasket or the Sierpinski Sieve, is a fractal and attractive fixed set with the overall shape of a triangle, subdivided recursively into smaller triangles. It is named after the Polish mathematician Wacław Sierpiński, but appeared as a decorative pattern many centuries before the work of Sierpiński. read more here: https://en.wikipedia.org/wiki/Sierpinski_triangle