I've gone all tribal! This is all painted free hand and is meant to be a little bit messy to add to the effect.
I started with the peach base colour - Models Own Nail Polish in Fuzzy Peach. Then some free hand random stripes of green and blue/grey. I used Bourjois 10 day Anti Chip in shade 23 and Bourjois So Laque Ultra Shine in Bleu Asphalte. And then just start adding lines, dots and flicks with black and white nail art pens.
Finish off with a quick dry top coat after the design is fully dry to avoid colour bleeding.