Start by painting the box your desired colors. You may mask off the glass first with some tape or just be careful to not get paint on the glass.
Once the paint is dry, cut strips of paper to fit inside some of the pockets and around the outisde of the box.
Embellish with the dimensional magic by making dots, filling in patterns on the scrapbook paper, etc. Just make sure to let it dry completely before moving to another part. If you shift the piece, the liquid will run.