The picture was taken from a photograph of a dune beach. The colours and the lines of the perspective on the beach and the lighthouse in the background were and are decisive for the chosen image detail.
The picture is based on this schematic quality.
The alienation of the concrete - its abstraction - exposes the effect of the surfaces, colours and lines: it allows the viewer to look past what was previously obvious and opens up the space for an interpretation of what is probably in what one sees.