Sierpinski triangle

Sierpinski Triangle is a cool pattern made up of lots of tiny triangles. To make the pattern you start with one big triangle and then divide it into four smaller triangles. You then take away the middle triangle, and you are left with three triangles. Now you do the same thing with each of the three triangles, divide them into four smaller triangles, and take away the middle triangle. You keep doing this until you have lots and lots of tiny triangles.