Checkers / backgammon discs for dentists (And all lovers of teeth and root canals)

I have a friend with a dental obsession and a backgammon board, and she asked me to design these for her.
Intended for color-changing printing.
They are designed for a small backgammon board so the diameter of the disc is 13 millimeters - feel free to scale the file according to your board
(There is a chance that you will want to increase only in the x and y axis and not in the zed axis, or only slightly in the zed axis .. for your consideration
It is recommended to print and give as a gift to the tooth lover in your life, I know you have one, everyone has :)