I have a 63 inch sideboard on one wall of DR. I want to put a gallery wall of identical 12x12 frames above it. The wall is really tall and long and sideboard is the only thing on it. I'm not sure if I should keep the 12x12 frames within the length of the sideboard only or could they extend out about 2 feet on each side of the end of the furniture...or would either way be fine? just trying to fill a large empty space and thought maybe the art could extend out? Thanks