I'd probably go with continuous curves for the yellow and blue in the Irish Chain,with some type of wreath or Celtic knot in the gray. On the other one, either an all over design (something curvy since so many rectangles) or I'd do an outline of the narrower rectangles (about 1/4" inside the seam) and then do some FMQ in the larger rectangles which could be different with each rectangle and you'd still be able to "move" without breaking thread often.