Block 9 World's Fair Block

I really like blocks that use four patches. 

You can get variations by rotating the elements that have light and dark

Right now there's a popular pattern by Lissa Alexander in the February 2014 issue of American Patchwork & Quilting called "tone it Down"

This is the version by Camille Roskelly, from her blog post http://www.camilleroskelley.typepad.com/

I think if you used four of the worlds fair blocks you could get a similar effect, hmm, I think I must go play with my quilting design program now.....