As a general rule, an intermediate block is rarely more difficult to make -- it just contains more pieces and therefore more seams. This is the reason that it is important that you can sew an accurate quarter inch seam allowance. Once you have mastered a precise seam allowance, you will have no difficulty in sewing the majority of quilt blocks.
Free Quilt Block Pattern
The Fan Waves was a new quilt block to me. I am not even sure this is the correct name for this block, but I liked it.
This quilt block features half square triangles in two different sizes, as well as quarter square triangles (which become the "goose" part of the flying geese unit). When you put it all together, you see a pinwheel (or a fan) in the centre of a star. All in all a good use of different patches, which results in a wonderful learning experience.
The sample quilts illustrated give you ideas of how to make a quilt that is totally different than your "neighbour", if you happen to be using this block in quilt class. Enjoy!