Take out the "mediums" which would be the giraffe and small floral on white fabrics and replace with lights. As for the solid black, keep it as the outer edge so it creates a secondary pattern (if you want one that draws the eye) or take it out. I've seen a solid used on both sides of the dark corner then the blocks put together with 4 dark corners in the middle to create a sort of star secondary pattern that is awesome. You can hardly go wrong with a log cabin pattern in my opinion. Your quilt will be beautiful. Keep it up!