Logofflater made a great point, I know my husband has a different take on things and what is visually pleasing. For me, I like the idea of adding a staggered vertical black sashing strip to each of horizontal sections and then adding a black sashing between each of the 3 horizontal sections and using the same sashing as the first border. The sashing could mimic the breaking up of the frames in comic books. But, I have a feeling your honey might like it "as is".