I had a spare cut-out from when I was cutting one of my stencils. When creating my stencils, I design the pattern on my computer (in Corel Draw) and print it on a piece of paper. Then I attach the paper to a piece of acetate (or anything else I'm cutting my stencil from) with scotch-tape and cut along the lines with my craft knife. Sometimes I keep the paper cut-out for future use.
[quote by Oscar Wilde]
What really made the difference in this case is the white outline – it made the pattern pop out and unintentionally created a Celtic knotwork.