I also managed to create a back cover. I decided to have a the Copic Colour Challenge - Sketch and also the Just Magnolia weekly challenge - Buttons with it.
I have only just started using Copic Markers and only had a few colours at the moment. But I have had so much fun with them that I will differently be buying some more. Copic Markers that I used are: E00 Skin White, R20 Blush, YG91 Putty, YG95 Pale Olive, B45 Smoky Blue, B93 Light Crockery Blue, W1 and W3 Warm Greys, V91 Pale Grape, RV95 Baby Blossoms and Y11 Pale Yellow. Also Chine Blue and Blue Pearl Pro markers. I added fake stitches using Purple Stardust pen and added holes to the stitches using a needle. I added two shades of pink buttons and a butterfly charm. The Sketch for the Copic challenge includes text but as I wanted this for my back cover for my card organiser I decided that I would not add any.