Required:

• Black nail polish
• White nail polish
• Silver nail art pen
• Strip brush

Top coat
Step 1: Using the silver pen, draw a diagonal stroke from the left side corner of the nail going upwards.
Step 2: On one side of the silver lining make feather strokes with white enamel and the other side with black.  
Step 3: Top it off with a top coat to secure the art.