John Ernest was born in America and came to London in 1951, where he began to exhibit with Victor Pasmore's circle. He taught at Bath Academy and Chelsea School of Art and, in addition to making art, he designed and made scientific models. Ernest started to make constructions in 1954. This is one of five related works which grew out of his interest in making visual equivalents for abstract mathematical models. The relief demonstrates the limitations of choice imposed by a grid system within which a fixed number of possibilities may be explored. Ernest presents a series of alternative groupings or permutations where similar elements are grouped in varying relationships of colour, shape, relief and surface.