Step 1. I cut some 1x3's into 16 inch pieces and cut them at 45 degrees at the ends. I attached all 4 pieces together with a staple gun. The frames aren't holding a lot of weight so the staples will hold. I used about 5 on each side and hammer them in to make sure they are tight.
Step 2. The next step was cutting the Wainscoting. Just used a jigsaw to cut them to 16" X 16".
Step 3. I attached the wainscoting to the frame with wood glue.
Step 5. After all the cutting was done I sprayed everything with a satin white can of paint.
Step 6. I attached the frames to the back of the wainscoting with some wood glue.