I bought a towel at the dollar store and chose three fabrics I had that had similiar colors but weren’t matchy matchy.
First cut your fabric into strips. Mine were about 4 inches top to bottom, and for the width you just double the width of the towel. You could sew the edges of your fabrics under, but I like the rough edge look so I didn’t.
Sew about about 1/2 inch from the edge – do not use your reverse at all, just sew straight across your strip. Set your machine to it’s maximum stitch length.
Keep adjusting your ruffle until it looks even and is the same width as your towel. Then tie your threads on each side in a knot.
Pin on your second ruffle so you can’t see the top of your first one, and sew it on. Do the same with your final ruffle.