This design is definitely a messy one, but the most fun. Paint a white base coat. Then, get a plastic straw and cut in half; put some red nail polish on a paint palette, magazine cover, or jar lid (again, creativity with the tools); cover the tip of one straw end with the polish; aim toward the nail; and blow into the straw. There you have it, messy blood-splatter effect. Just don't suck nail polish up the straw whatever you do.