Malcolm Hughes was one of a group of international constructivist artists who have upheld a purist, non-figurative approach to making art. Central to their work has been the development of an abstract language of idealised forms. Such art communicates in a very direct way, through form, line, surface and colour. The artist described this and related reliefs as exploring ideas about sequence, rhythm and repetition, light and physical space. 'The conceptual means employed tend to be those of extraction and reduction from a given sequence of numbers. Sometimes these are taken in one direction only; at others, alternating direction and superimposition are used.'