Antonio Sinagra submitted this brightly colored skull doodle.
Sometimes, while doing other things, you feel inspired to doodle something. Your mind wanders away from the task and little whimsical images appear on your paper. I like the intricate swirls around the skull, and the tightly packed zig zags that form the skull. Doodling in a great way to release sudden bursts of creativity, and can be relaxing enough to get you back on track with the main task.