Neat-O. Very Mod-Abstract, yet also a homage to ancient petroglyphs. (boy, I should get a job writing ad copy). I have to admit that if you hadn't told us WHAT you had casted, you could have had us all guessing. Rather than "Name That Wood" we could have done "Name That Casting"
Super neat, very colorful, that's a pen I'd just want to pick up and have with me on a Saturday as I go about my chores.
Steve W.