Improv circles or bulls eyes.
In June we made some Block Lotto Bulls Eye blocks using this similar method and I really liked how they turned out and had fun doing them. So I decided start these as another new RSC project using the color(s) of the month and red and brown as my "neutrals". I'm using chunk scraps for these.
I fooled around a little with mixing and matching these, separating them by a thin sashing, etc. but in the end I think I liked the four fabrics stacked and whacked all together in one block. I started with 8.5 squares of fabric and squared them up to 6.5 inch finished blocks. Four of them together will make a 12 inch block and use up a lot of those chunks of fabric.
I made enough of these units so now I have (sans border units which are a different size) enough colors of the rainbow to make...
...a quilt similar to this one called Red Centre from Kathy Doughty's book Making Quilts.
FYI - believe it or not both of these blocks use a similar method of construction called Stack and Whack - stack up pieces of fabric, whack through them, swap out a few pieces in the stack and then sew the whacked pieces all back together again. You get multiple blocks from each stack you whack.