We have this final project for my math class and I was thinking of using geometeric series to get different shapes. I found this great web site http://www.ugrad.math.ubc.ca/coursedoc/math101/notes/series/serapp.html [Broken] but our teacher has already used it as an example. Do you know any other easy shapes I could do. Not involving :tongue: complex numbers...Julia Mandelbrot formula. It doesn't have to be about geometeric series it could be any thing that involves calculus.