I don't think I'd have the patience to create something as beautiful as that, but I quite like what I came up with.
I started off trying a bow:
I had problems with the bow as the circle was too large and I couldn't add enough nail polish to make it stick, so I made a thinner one to practice on:
And finally got it!
So I created a collection of a few together:
And then painted them with the nail varnish. I'd advise that you first paint around the edges on the inside and let dry to a tacky consistancy, then swirl a full brush around the inside and it should take:
All dry the next morning:
I only had the black nail varnish to hand, but I bet it would look great with pastel colour nail polishes, like the ones from the original pin.