Creating this gradient look is so easy - the trick is to work quickly to let the polish colors blend together, creating that gradient effect.
Start with one coat of JM on half your nail. Then apply XOXO to to the other half of your nail. Then repeat, while polish is still wet, creating the gradient look.
To add the heart, use the dotting tool and striping brush to connect two tiny dots with a a V shape. Then carefully fill in the shape with the striping brush. Olive it!