Op Art is a kind of abstract art based on geometric patterns. It often features repeated shapes or fractals that create optical illusions of movement.
Jeffrey Steele is an Op Artist who was born in Cardiff in 1931. He painted his picture Harlequinade with incredible care in oil on canvas in 1963. The fractals are black circles on a white background. He repeated them in rows and imagined more rows on top of them. The circles get smaller towards the centre, as though you’re looking into a tunnel. The rows twist to give a sense of movement.