4.5 hours, compressed into 2 minutes. Took a photo every 5 seconds using a gopro attached to the ceiling light. All design were first done in pencil, using a 2by4 as a straight edge, and a shoelace and nail as a compass. Then inked over with industrial permanent ink pens.
Detailed photos and additional artwork can be seen at:

40oz-design.tumblr.com/

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