My interpretation of "doodle" is "something quick and artsy." I decided to do a contour drawing, which is inherently fast and artistic. Unfortunately, since contour line drawings are only a single line, it's tough to show process. My solution was doodling on a note, including my own name, in the same "pen" (this was made in sketchbook pro with a pencil pen) as the art itself.
This is the version without my addendums:
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