Zentangle weekly challenge number nine is to use a new tangle designed by Laura Harms, the Diva who issues the weekly challenges! :-) ARTOO is the name of the tangle, and also Laura's blog name for her younger son who was in the hospital for a spell recently.
In the first tile I used a "Brush" pen I've had for a while to do the 'artoos'. I discovered that it's running out of ink, but I like the heavy lines it provided when I pressed a little harder and touched 'em up with a regular pen. (Think I'll get a new one and see what I can do with it.) The second tile is more delicate. Interestingly, both have an underlying spiral form.