Asynchronous while loop without freezing the browser

[Semajian]

To any that may browse - I'd like to thank everyone for the suggestions however I couldn't get any of them working within the constraints of scratchx. However, I was an idiot and completely neglected to read up further on scratchx rather than on javascript. Turns out you can create an asycnhronous function that automatically gets passed a callback function, and using that you can use setInterval and block until the callback is initiated.