For gel nails. If you don't have gel nails, you could paint the your nails a base color of clear, then add a blob of any colored glitter to the tip of you nails. Then, using a facial sponge, dab at the blob to creat a soft blend.
using any polish of your choice, pour onto a flat surface, take one of those spongy eyeshadow applicators and dip into the polish, dab the polish on your nail concentrating at the tip and moving slightly upward. put a topcoat over the entire nail.