The squares were created by using a resist technique. I first stamped my flourish (Tim Holtz Visual Artistry Flights of Fancy clear stamp set) using VersaMark ink. I then did one coat of Ultra Thick Embossing Enamel to create the resist. The color was added using Ranger Distress Ink in the colors "Peeled Paint" and "Dusty Concord." The sentiment (also from the Flights of Fancy set) was stamped in the same "Dusty Concord" color.
I am really pleased with how this turned out. It is probably the most "negative space" I have ever left on a card too, but I think it works really well. I am definitely itching to try this resist technique some more!