Rainbow Quilt. 

I made this with colour swatches and green cotton material. 
Make sure everything is ironed well first. 
Instructions: Cut your swatches into strips.  Sew all strips together in the sequence you want (light to dark).  Cut strips to create lengths.  Unpick at a different colour each length and sew that to the bottom of that section.  Sew the lengths to a solid colour (here it is green).  Add a boarder all around in the same colour.  Add filling and backing the same size as the front.  Quilt all the layers together.  Sew the edging around the entire quilt only on one side. Fold the edging to the back covering the raw edges and hand sew all around.