I've been playing around with this technique for a while and decided to write it up as a simple pillow project. The fabric scraps on this pillow front are improvisationally-pieced with narrow solid sashing between each -- sort of like little bits of mosaic tile surrounded by grout.
The tutorial is for a 24" x 24" floor pillow, but the piecing technique could easily be used to make a pillow of a different size, or even a whole quilt.
My pillow is finished with a very simple envelope-style closure. I finished the edges of the envelope flaps with double-fold binding for a polished look. The pillow back is made with Quilter's Linen in Leaf.
For the fabrics on the front of the pillow, I put together this set of 12 fat quarters in citrus colors and gray. (I especially love that Alexander Henry Thea!) 12 fat quarter is enough to make several pillows, or even a small quilt using the same improvisational mosaic piecing technique.