It probably would have been less if I didn't get sidetracked by someone wanting some actual work done.
The process:
- 12" dia circle
- Array middle circles
- Array outer circles
- Pline to outer circle centers
- Offset to outer circles tangent
- Create lines in middle circles using centerpoints/rotate
- Export linework to PDF
- Bring PDF into Photoshop for color matching
- Export to PNG
- Post it up here