Paint your nails in your desired colour. I have chosen Nails Inc. - Baker Street (cause it's amazing ;)).
This step is optional, depending on how opaque the colours of your nail polish is. Using the brush of a white nail polish (Models Own - Snow White) blob random spots on your nails (emphasise random). Size of spots doesn't matter, it depends on you.
Fill in the spots with whatever colour (or colours) you wish. The colours did not show up correct at all, but other pictures later in the post are better.
Orange: Essie - Tart Deco over Bourjois - Tangerine Fatal (I changed my mind ;))
Blue: The Face Shop - GR501
Purple: Essie - Lilacism
The magic step where everything comes together. Cause currently it just looks like random blobs of colour on the nails. In my case, using a black nail art pen (Lovely Me:Ex - Black) or a toothpick/dotting tool dipped in black nail polish draw 2 not so round "C"shapes around each spot.
(The better pictures of the colours :P)
Honestly I love it, just cramming so many colours on my nails a "sophisticated" way. It's fierce ;P