'The moth-eaten velvet curtains Harry had passed earlier had flown apart, but there was no door behind them. For a split second, Harry thought he was looking through a window, a window behind which an old woman in a black cap was screaming and screaming as though she were being tortured - then he realised it was simply a life-size portrait, but the most realistic, and the most unpleasant, he had ever seen in his life.
The old woman was drooling, her eyes were rolling, the yellowing skin of her face stretched taut as she screamed.'
J.K. Rowling, Harry Potter and the order of the phoenix, p.74 english edition.
Well, ok, she's not drooling in this picture. But I hope that you'll find her suitably ugly and unpleasant. And now, I'm going to try to draw some happy Harry Potter picture. Anyway, I have to, I haven't got any black paint left...