Hi! Thanks for the comment. The technique used to make the card is called "iris folding". I would suggest googling that, as it turns up many tutorials and templates for designs. Individual strips of paper are taped to the back of the cutout, starting from the outside edge and working in. Because the back of the paper can get a little messy, I would also recommend planning to have a second sheet of paper backing the design. In this case, I folded the white paper into quarters, so the front and back were each two pieces of paper thick, and then glued the edges of the two front pieces together after I was finished with the heart.