You might like Left Right Scarlet, Emerald, and Orange : July-September 1976 Patrick Heron 1976 Overcast Trevor Bell 1961 Everglades Edna Ginesi 1964 Cambridge Green Mark Lancaster 1968 Three over Four Robert Medley 1970 No. 5/73 Jeremy Moon 1973 Cantus Firmus Bridget Riley 1972–3 Four Shifts I John Loker 1977–8 Other Cloud Painting Jennifer Durrant 1978 Cadmium with Violet, Scarlet, Emerald, Lemon and Venetian : 1969 Patrick Heron 1969 Isphahan Robert Medley 1974 Calshot Trevor Bell 1970