I have designed this funny button in Fusion360 from a picture of a coaster knitting project I received from my daughter in law.  Since I have no talent for knitting, I print it with my MK3S PRUSA printer. This will be my first design to the new Flash Contest.

•  Simple design geometry made of lines, all tangent circles and one ellipse.
•  Design to suit 3D printing.
• There is a color change before the last two layer. 
• I recommend to use a darker color and a lighter for the color change.