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 Series 40cm Continued H Gordon House 1969 Series 40cm Continued J Gordon House 1969 Red Quarter Arc Gordon House 1971 Untitled Rory McEwen 1969 Geometry? Joe Tilson 1965