You can view the first 100 diagrams in a grid or view the diagram for the N of your choice. There's also an option to view an alternative diagram where the drawing starts with the smallest prime instead of the smallest.
It actually uses the last prime drawn, so it's only useful in 'smallest first' mode. That ought to be fixed, but I was lazy about it.
Colorizing the image based on the largest prime makes the pattern intelligible a little bit longer, before it becomes impossible to tell the big primes apart.
You know about Math.PI?