To recreate this look, you are going to start by painting all of your nails with a grey polish.
If you follow the artists design for the dotted garland, you will need a bright mint green polish and neon orange and pink polishes. Feel free to choose your own colors, though. With the colors you have chosen, put them in the order you want. Then, use a dotting tool to create a random garland of color across all of your nails. The garland can also be as simple or as complex as you wish.
Once the garland is finished, add a layer of your favorite fast drying topcoat.