Little known at home, but a superstar abroad, he flies around the world to open 15 major museum exhibitions - a journey that also reveals his extraordinary life story. Now, at the age of 73, Scully opens up about his unique experiences spanning 55 years in an often hostile art world, how he built a reputation from nothing, having grown up penniless on the streets of Dublin and London, often homeless as a child and running with street gangs as a teenager, to turn his striped paintings into the huge success they are today.