You can do this with sharpie you know. You can draw anything you like with sharpie on your nails. If you put a base coat down first, the sharpie will just chip off with the polish, so it does come off and it is a lot easier to manage than polish.
Start with nude base coat or a "natural" sheer coat coats). When dry use tape or free-hand white tips on each finger. After that dries, in a navy blue polish, use a nail art pen or fine-tip brush to create a clean line under the white tips. =]