In my early work I didn't use much colour. I had no confidence about how I could do this.

At the Summer Exhibition, I didn't really change anything; it's the same exhibition. All I changed is the presentation. I didn't really change the rules.

In the studio, it took me a long time to work out how to make paintings that had the intensity that I was able to create by painting whole rooms. There is a very limited number of colours but there are many variations. I decided to use the purest palette that I could.

I don't like the idea of nationalism, but on the other hand, I do see that there is a difference between British art, German art and Chinese art. This is because of the history, because each country has different history and each country reads and teaches that history differently.

In my early work I didn't use much colour. I had no confidence about how I could do this.

The complexity of the language of images is disguised by the ease and rapidity with which we read them. I've tried to make work that is as transparent and simple as possible. No matter how much I strip away the result is always more complex to me than I expect.

I had been doing wall drawings, but they were always black and white. Then in 1993 I painted all the walls of a room to make an installation and as soon as I saw the colour on the walls, it changed my whole life.