I didn't see this when I was doing it, but looking at the pictures now it looks like the silhouette of a cat's tail against a big, full moon. Uh, yeah, I meant to do that. ;) Border nails are hard! The ones I've done in the past were a different technique and were much easier, but also had a different look. They're not really the same thing.
This look took me a lot longer than I felt like it should have. I might try this again some time in the future, but it definitely won't be soon. I love the colors together though. The blue is Revlon Chic and the grey is Julep Brigitte. What do you think of my unintended cat, sort of Halloween-ish mani?