I was in London this weekend and went to Tate Modern to see an exhibition of Gabriel Orozco's work - weird and wonderful! No photography allowed... So here are links to some really interesting videos of his work:
His Samurai Tree Invariants are what fascinates me most - a series of 672 variations on a theme. Only four prints were on show in London, but you could buy a book with all of them - terribly expensive though. It is a computer generated design using circles of different size, following certain rules, which he then filled with four colours - blue, red, white and gold. By changing the colours of the circles (half circles, quarter circles) and of the background, he produced a huge number of variations. The circular shapes can stand out, or they can disappear, when they are painted in the same colour as the background. Fascinating!
Have a look! You can also google Orozco's images.