Nicely done. This is a fun idea that comes up time and again.

I think I might have made one of the first implementations way back in 2011: https://web.archive.org/web/20111117062015/techbelly.com/sem...

And someone quickly made a better version inspired by it here: http://lexadecimal.pixielabs.io/

Done better here: http://lexadecimal.com/