So here is what you will need:
-Bright green nail polish
-Some sort of black nail polish nail art medium (I'll get more into this in a moment)
- Top coat
- Optional glow in the dark top coat
To begin with, these are the products that I used:
The first thing you need to do is paint your nails with the bright green nail polish, then let them completely dry.
This next step is optional: add a glow in the dark top coat. I did this step using China Glaze Ghoulish Glow.
As I was doing this tutorial I completely forgot to take pictures of the design as it went along (oh, no! D: ). So I made some little diagrams to show you step by step how to do it. The diagrams are probably easier to see than if I showed pictures of it on my nails.
First take your black nail polish and whatever method you may be using, and draw a line like so: