Not my best nails but I was testing out how well I could do triangles. Also testing out the Red Nail Art Pen. (which I really don't like) Really like how both middle fingers turned out. And as usual my thumbs turned out pretty good.
By the way, I never thought to use tape to make shapes on nails, until I saw this and this blog.
TIP: Before putting the tape on your nails, stick them on your pants or shirts a few times so the tape becomes less sticky. (don't worry it will still stick, on your nails.) This way you're not fighting to get the tape off.