Press The Green Flag! Say the number of sides. It will draw the shape out of squares to fill the screen. It works with really big numbers but then It's really slow. (unless you're using Turbo-Mode (shift-click green flag) then its not real slow)
I know It's Kinda Boring But It's Something! Yeah... I was bored so I made this but It's not BAD!!! It Automatically Resizes to fill The Screen (that's the cool part... I Think) :3 But Plz Love and Fav. it! Thanks @baptiste2b31 for reminding me that turbo-mode exists :P