Katy Perry's Yin-Yang Nails

Did anyone catch Katy Perry's yin-yang nails during her Graham Norton Show appearance (if you didn't, they're also on the cover of ELLE Magazine)?

I did these by hand. When attempting this, make sure you keep the lines fluid and curved. It's easy to fall into a geometric trap which will not give you the look you want. The dots were done using a bobby-pin end as a dotting tool.