basically: a clone spawns every split second, and that clone forever makes another clone, and that clone does it, and it happens forever, which overloads scratch and thus crashes the page. it also crashes every other scratch page opened.
fair warning: this does crash your page, if your using a weak device, well it may overheat and probably explode also if your reading this while crashed, just refresh the page or wait for a message to pop up, then click close and then the crash message for your website appears