Rather simple, and I like this design so much I’ve done it twice now!
Two coats of Barry M Gelly in Lychee to start with. Then, using a nail art brush, two coats of Barry M Gelly in Blueberry in the shape of a triangle. Once that’s dry, add a coat of your favourite clear top coat, and then stick a stud on the point of the triangle. Finally, add another clear top coat on to seal in the stud.