It is made with small blocks and triangles, to make a 4 by 4 square of light and dark values.
On the left, experimenting with a nine patch, and on the right, the Perkiomen square. I decided the classic 4 by 4 square was best. Once you make a number of squares, then you can put them together in interesting ways.
This was my first try at it. All in modern fabrics. but it does give the same impression of light and dark pathways as the antique quilt.
This quilt is also unfinished, and in my sewing room somewhere. Hmm I am detecting a theme here.