A sweet little nautical design...
All that is required is a white polish, and a blue and red striper.
Start by painting your nails a block white, make sure you have used a base coat to protect your natural nails.
French tip the ends in your favourite blue. I used the teal colour from No. 7 (available at Boots)
Finish off by striping two red stripes across the bottom of your nails.
....And there you have it, a sweet nautical design.