My coloring

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This one is from my Optical Illusions book.
When I first looked at it I wasn’t sure how I was going to color it.
But opted for blue,pink and yellow highlighters and a brown
gel pen for effect.
Doesn’t look much in the photo but it’s nice to look at under
Electric or sun light.

Cheers
A
Quote of the day:

Logic will take you from A to B...
But imagination will take you everywhere.
A.Einstein
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Reference book