Paint your nails with 2 coats of a glitter polish
Get your striping tape. This can be found on eBay.
I precut my pieces and attach an end to my work station.
Place them diagonally on the nail.
Then again going the opposite direction.
Place your polish over the tape and wait about 5 minutes to dry.
Pull off your tape.
Add dots in the corners.
Add topcoat and you're done!