A quilt block I designed is featured as the Modern Quilt Guild's Block of the Month.
You can find the pattern and an article on utilizing foreground/background in quilt design to give your quilts movement for MQG members only, here.
The block is called "Mod economy square" and it has a ton of versatility! Playing with color placement can bring several different areas to the foreground.
Just a few of the different quilt layouts you can make using this block: