Mine didn't turn out the way I wanted, but they're still really pretty.
I started with one coat of Fascino Blue as a base, then went over it with a coat of Sinful Colors Mint Apple.
Once that was all dry, I dripped some Sally Hansen Golden-I into water, as if I was about to do a water marble, but instead of adding more colours and swirling, I spritzed it a couple of times with rubbing alcohol, then I dipped my nail in.
After I finished the gold on all my nails, I did the same thing with Avon Licorice.
Here's where I made a mistake - I used two drops of black, but you only need one.
I highly recommend taping your fingers if you're going to do this, because I didn't, and I had to do a LOT of cleanup.
I'll definitely be doing this one again - I really like it.