Done on the iPad, using the Brushes app, two hours. I like this one much better than my last few of attempts on the iPad. Painting on the iPad is fun, but it's a fight. I remember watching the documentary "It Might Get Loud" a while back and hearing guitarist Jack White talk about how he feels like playing his guitar should feel like a battle, and he's trying to conquer it. That's kind of what painting on the iPad feels like to me, and maybe that's why I haven't given up on it yet.