His failures are as valuable as his successes: by misjudging one thing he conforms something else, even if at the time he does not know what that something else is.

ISBN 978 1 85709 497 8. Riley began investigating colour in 1967 the year in which Bridget Riley produced her first stripe painting. Typical of these later colourful works is Shadow Play.

She currently lives and works in London Cornwall and France. For the boxer see Bridgett Riley.