"Spiegel im Spiegel" in German literally can mean both "mirror in the mirror" as well as "mirrors in the mirror", referring to an infinity mirror, which produces an infinity of images reflected by parallel plane mirrors: the tonic triads are endlessly repeated with small variations as if reflected back and forth. The structure of melody is made by couple of phrases characterized by the alternation between ascending and descending movement with the fulcrum on the note A. This, with also the overturning of the final intervals between adjacent phrases (for example, ascending sixth in the question - descending sixth in the answer), contribute to give the impression of a figure reflecting on a mirror and walking back and towards it.
Minimalist piece from 1978, originally for violin and piano.
Minimalist piece from 1978, originally for violin and piano.