Whoops, sorry about that. I've now calmed down the script and (significantly) limited the number of iterations. There is a small blinking orange square in the

Whoops, sorry about that. I've now calmed down the script and (significantly) limited the number of iterations. There is a small blinking orange square in the top left-hand corner of the page that should start the cascade if you click or hit any key. May only work in FF atm.