SimplyMad.
missladyfinger:
 1. Paint your whole nail light blue

2. Paint a stroke of yellow, starting from 1/4 of the nail down slightly diagonal
3. Paint another diagonal in the other direction
4. Round out the yellow curves with a small brush
5. Use a black nail art pen to follow the curves of the yellow polish leaving a space of light blue in between
6. Top it off with Fast Dry Top Coat and voila! 
(Photo: Elle.com)

missladyfinger:

1. Paint your whole nail light blue

2. Paint a stroke of yellow, starting from 1/4 of the nail down slightly diagonal

3. Paint another diagonal in the other direction

4. Round out the yellow curves with a small brush

5. Use a black nail art pen to follow the curves of the yellow polish leaving a space of light blue in between

6. Top it off with Fast Dry Top Coat and voila! 

(Photo: Elle.com)