Step 1
Using the lightest of the two colours, paint your nails and wait for it to dry completely.
Step 2
On a flat surface, paint a generous amount of the colours right next to each other on to the plastic. Make sure they're just about touching at the edges.
Step 3
Using a toothpick, swirl the two colours together where they meet. The area where they mix will determine the length of the graduation. So if you want a long graduation, mix a bigger section of the colours, if you want less of a fade, just mix them together a tiny bit.