That's J.S. Bach's Canon a 2 per tonos you're hearing. (If you have clicked on the little speaker icon, that is.) It is only due to modern advances in sound synthesis and psychoacoustics that we are able to hear it presented this way, both solved and endlessly repeatable. If you don't know what I mean by that then listen for the key changes.
I created this section of the site largely because I hope to make a music someday (also why i've had an empty bandcamp for two years now). I have very little experience, so an even littler output, but check back in ten years and maybe there'll be something worthwhile here!