This draws the pattern given when playing the Chaos Game.
The pattern is called the Sierpinski Triangle.
You can change the size and number of iterations using the buttons under "Show Options". Change to the value you want and then click on the button.
You can also hide/see this text using the "Toggle Text" button and you can refresh from the server using the refresh button.
I was writing this from scratch and got really close when I found a website by Kirupa that taught me some useful tweaks.