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IMM - Tri-Part Brush Alternating color bands

IMM
Looking for ideas on how to create alternating color bands using a Tri-Part brush. (like Color bands on a snake)

on a tri-part brush, In this case the repeating middle section needs to alternate color1 and color 2.
I’ve tried making the middle section with the alternating colors, but when converted to a curve brush in does not bend correctly.
If not Tri-Part Brush, perhaps there is another way to use ZBrush for this situation?