I used sevinism's great track shifting sands,
Sevenismism – Shifting-sands-disquiet0269
and added a bit of my own stuff. I didn't play anything, it's midi piano, with a few effects and then a short segment of voice.
When I heard sevenism's track at first I had no idea what I could do, but after a while I slowly got some ideas. I used the suggested random number generator to pick a track, my first pick was not downloadable, so this was my second (randomly selected) one.
... a bit more ...
When I heard shifting sands, I thought of being lost in the wilderness, so that's why I added the part about "where are you". To make this better, I thought I should add a few more effects in the first part, like some more chords, repeats, panning and so on.