I wanted my mosaic heart to be neat and clean with pretty patterned papers. I drew the heart in Inkscape and then built a sketch and layered template to share from that image. Here is my layout using the mosaic heart titled "You make my Heart sing."
I created my layout using a kit called "Brighter Days Ahead" which is a collaboration kit by several designers available at Sweet Shop Designs. The heart is composed of 1" squares. I used four different colors of patterned paper. If you are a digi scrapper, there is a separate layer for each color in the digi template. Here is the sketch for our paper scrappers.
I have a separate image of just the heart so that those of you who want to build your mosaic heart from paper can trace the heart. Here is the image of just the heart.