Deputy's Wife has been wondering how I pieced the rainbow quilt.
If you look closely, you might be able to see a seam line in the middle of each color. All the pieces are the same size as the black diamonds. Correct arrangement gives them stretched rectangle look.
The piecing method is pretty similar to how I did this binding. Or at least the cutting on a 45* angle.
And here's the Simply Quilts episode that sparked this quilt. :)