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.
Flock of Birds
Free Quilt Block Pattern
The Flock of Birds quilt block is another example of using simple shapes and rotations to create a new look. This quilt block contains only squares and half square triangles so on the surface, it is an easy block. However, I have added it to the category of intermediate difficulty because care must be taken to achieve an accurate quarter inch seam allowance in order for the patches to match up where needed.
The two sample quilts illustrated show just how different your quilt can be from someone else's. By rotating the individual blocks, whether you set them in a straight, side-by-side setting or on point, the looks you can achieve are endless.