This was one of the first pieces I ever learned how to play on the piano. The melody was composed by Jeremiah Clarke in the early 18th Century. I have altered it somewhat by changing the key and writing a new left-hand part, which to my ear sounds less drone-like than the original.
Also, for those who were wondering, yes, the piece is actually very short.
This sound file was produced using LMMS and edited into its current form using Audacity.