I did a challenge recently through Picture Polish. The theme was Geometric. I used the Picture Polish shades Wisteria, a warm lavender purple, Citrus, a bright orange cream, and Majesty, a pretty rose gold shimmer polish.
My lines aren't very straight but I tried! I do like the peek-a-boo sections with Majesty though.
Picture Polish is a brand from Australia. They are available for purchase through Picture Polishes website.