Computer Art: Tree

I purchased a Wacom graphic pad a few years back (so far back, that their website doesn't show my ruby colored one, it's already outdated). I experimented a lot with the different 'mediums' the first year I had it, and did a series of 'chalk' on 'colored paper' including this tree. I haven't done much with the pad the last year or so, I need to get the computer it's connected to ready to roll.