To learn to ride a bicycle, as with the other great noble human inventions, is a hugely complex activity. Generally, it requires three things: the learner, the teacher and the bicycle, all in the same place at the same time, most often outside someplace.

I wasn't always minimal. In the early days, I was laying it on as thickly as I could, trying very hard to get it right. But I found that the harder I tried, the more tired whatever it was I was working on looked. And then I grew tired of it as well.

Whatever I'm thinking about has got to fit into thirty-two pages, the standard picture book size. So that's something. But the structure and the form for me are almost the most important, because these will express as much as words and images will the content of the work.

Whether it's music, loss of something, loneliness or friendship - if that emotion is heightened in some way and painted to fit in between the covers of 32 pages, that can become a picture book.