Originally Posted by
BizzieLizzie
It is intriguing but I have never seen it before. I think that it would not be too difficult to sew the pattern. Could you appliqué 0.5mm different coloured strips, cut on a bias, haphazardly to each square and then join them up as in the picture? Alternatively you could paper piece each square? Best wishes on finding out more about this pattern.

I like your first idea. Cut narrow bias strips from solids then attach like you'd do rickrack or some such trim.
Each trim piece seems to be attached identically to the squares------------which could vary a bit in her case without losing the integrity of the design.