After I took care of the string of lights, I went to work on the thumbnails. I used the green polish and a fine-tipped brush to make a Christmas tree shape. Then, I took the gold polish to make a star, red polish for ornaments, and brown polish for a trunk. Here's the end result:
And here is the completed look! I've been getting a lot of compliments on it. If you give it a try, let me know how it goes.