Polish your nails with desired color. Dip your nail into a glass of rubbing alcohol. Place and press a strip of newspaper on your nail for 30 seconds. Finish with a good clear top coat to seal the deal.
Put water in a bowl, drop random colors of nail polish in and swirl with toothpick. put petroleum jelly on your fingers so the polish only sticks on nails not your fingers. Stick fingers in bowl, nail polish should float on top of water.