You get two patterns for the price of one.

I am making the larger size (Father).

Colour A Indigo Plane
colour B Caramel Core Blimey

Colour A uses slightly more yarn. Started both whirls from the outside, continued from the inside but removed some yarn to the first colour change.

Starting HDC 245
24x10 repeats
Plus 1 for symmetry
Plus 2 border stitches
Plus 2 for chain spaces into which the easy envelope border https://m.youtube.com/watch?v=9q_I_T8R7yA will be made

Size before the border: 156 x 106