This is a great design for beginner nail artist or someone that doesn't have a very steady hand :)

Paint your nails a light grey color. This will be your base color.

Paint squiggly lines on your nails with a different color.

Using another color, paint more squiggly lines on your nails.

Again, using another color paint more squiggly lines on your nails. At this point you may want to start over lapping the colors. It will help make it look more like camouflage.  

Fill in any large empty spaces with the three colors you used for the squiggly lines. But remember to leave space to show the light grey color, or which ever color you use for the base. I love this design! You can use any colors you want and it's so simple, easy, and fun!