This has a unique setting! It is based on the classic twisted star / whirligig / pinwheel / windmill. There are actually three pinwheels in each design: a double pin wheel and then the pinwheel created with the integrated sashing.
The stars are double pinwheels. The blocks are in groups of four. The blocks are also assembled like the twisted star with the integrated sashing soas to "float" on the background and make an additional, third pinwheel.
Raggedy Ruth Designs™ went a step further and added double corners to the triangles using the Perfect Corner Ruler™.