When I have to listen to something that doesn’t require my full attention, I often doodle. It’s my way of fidgeting I guess. The process doesn’t really require much brainpower, but it keeps my otherwise idle hands busy.
Sometimes doodles turn into pretty cool designs. I happened to like this one and snapped a picture of it. A little Photoshop cleanup and I had a decent line-art base. For fun I applied different materials to it. It’s more fine art filler than graphics, but I added it anyways.