Your first two steps are spot on, but then step three could simply be to add a large buffer for each capital and use some and/or/nor/xor (I’d have to look up to be certain) rules to have the buffer zones not overlap, but end where touching. Apply a color scheme and you’re in business.
How did u make this
I don’t know how NaytaData made it, but if I were doing it, I would do something like this:
I would use a computer but the same steps would work with paper & pen.
If the OP is using GIS, it can be even easier.
Your first two steps are spot on, but then step three could simply be to add a large buffer for each capital and use some and/or/nor/xor (I’d have to look up to be certain) rules to have the buffer zones not overlap, but end where touching. Apply a color scheme and you’re in business.