Did this because I was bored of my plain yellow nails (OPI The 'It' Color), and I dug out my nail art pens a while ago which I had thrown aside and completely forgotten about it. So the black was done by a nail art pen bought from a Étude House. I really hate using nail art pens, they're so hard to control, And you have to maintain a constant grip. As I said, hard. This nail art looks rather cute, isn't it?