This one is very easy if you have it mastered. The things you need are (in this case) white nailpolish, a striper in a fluorescent color and a swab to wipe away the leftovers. Like you see in the picture, you really need that swab because only pro's can do it without one. It's very important that you don't push the striper too hard. In that case, you'll have a thick line and the stripes won't be symmetric. So be focussed!
Ice Cream Sprinkles
The first thing to do, is putting a base coat in a color you like. For example: a flashy red coat or pink in pastel. The choice is all yours! After you let it dry properly, you continue with a white coat that seems to melt like an ice cream. Let it dry and in meantime, you can choose two other colors than the base coat. As finishing touch, put it in sprinkles on your nail point.