I actually don't have that much time to spare and I already spend way too much time painting my nails. So I went with a simple design, using my previous day's orange as the base. However, the result wasn't that great — I already quite a few coats on with the base, a lot of white, colours and top coat. I needed another 2-3 coats for the yellow to be opaque... so it was just thick and then it got smudged quite badly during the night.
But anyhow, here are some photos. I just used regular sticky tape to make the line.