Thursday/ red & blue

Here’s one more spiro-graphy twirl, for now.
The design took several attempts to get a clean drawing without any slip-ups. It was done with repeated wheel-in-a-wheel-in-a-ring runs.

Blue: Align Hole 1A in Wheel 42 inside Ring 63 in Wheel 135, all inside Ring 180. Draw 1A-2A-3A-4A. Align Hole 1B at the top and draw 1B-2B-3B-4B. Red: Turn 90º and repeat.

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