By 1966 he had added color, in his work called greens crossing greens (to Piet Mondrian who lacked green) and turned, almost at once, into an accomplished colorist. (Just as most subsequent installation artists owe a debt to Mr. Flavin, it is difficult to think of artists such as James Turrell, who work primarily with light, without a nod in the direction of Mr. Flavin.) More events in a minimali