I've always been challenged by sketches. I never seem to be pleased with the results. This is like the others I've tried and will probably give up on sketches, but at least I tried. I used scraps for the squares and cut them out with with a Spellbinders die. I didn't have any more scraps the right color to finish the card, so just quit where I was.
If you enjoy challenges, you can find more of them in the Labor Day Virtual Card Making Party on the Stars & Stamps blog. I didn't get past #1.
I decided to go back to my embossing & sanding with embossing folders on the Core-dinations Chocolate Box cardstock.