I did the same thing for the "wire" above the Lookin' Good on this page. On the bottom I masked off off two sections when I sponged the blue on. Then I stamed the bootie in those two white squares. I shaded the side of the white and added a faux brad to the white square using the black watercolor pencils.
I really like this card. The design is simple and clean and the supply list is SHORT! You need two pieces of paper (one for the card and a glossy piece for the mask), two colors of ink, and two stamps. I stamped four roses on the left over cs after I cut out my card base, I cut these out for later. I stamped the rose on glossy cs and cut that one out to use as my mask. I stamped a rose in the corner then got out my mask. I covered up my center flower and stamped on both sides. I repeated this for the three other corners. Then I stamped my saying in the middle. I used foam tape to mount the other four roses. See? Simple.