A Google search found this blogger post of a Coonley-inspired quilt she designed and quilted
Quilting42 Blog FLW Window quilt
It appears to be mostly appliqued, not pieced, except for some sections of the squares, which look like they were pieced then appliqued onto the background fabric. The "leading" is 1/4" bias tape according to her blog.
It shows up in a bunch of Pinterest hits with no linkback to her blog.