Changes in the fifth state — especially in the background — demonstrate Matisse’s deep, evolving concern with construction. By examining the X-radiograph and cross sections, together with information from pigment, paint extender, and filler analysis, we can chart the artist’s numerous combinations of background colors and bands. Research demonstrates he repainted some vertical stripes as many as six times, adjusting widths and altering colors. The left edge underwent the greatest revision as Matisse changed the band from light blue to white, then black, and then to white again before rendering it in pale blue with a black leaf pattern, which he later painted in with green.