• Smartphone case
• A piece of paper printed with picture you like
• Oil-based pen
• UV color changing nail polish
• Top coat
1. Draw a picture on phone case with oil-based pen.(You can also put the paper on the phone case and trace the line from the top of it.)
2. Apply UV color changing nail polish based on the picture.
3. Once 2 is dry, apply top coat.
...and it's done♡