You might like Left Right Coloured Greys I Bridget Riley 1972 Derrynan II Harold Cohen 1967 Derrynan III Harold Cohen 1967 Derrynan III Harold Cohen 1967 Derrynan III Harold Cohen 1967 Derrynan IV Harold Cohen 1967 Derrynan IV Harold Cohen 1967 Parity Study in Blue and Red Anthony Hill 1971 Untitled Rory McEwen 1969 Untitled Rory McEwen 1969 Geometry? Joe Tilson 1965 Ziggurat 6 Joe Tilson 1966