This article provides an interesting take on Star Wars as a ring composition [starwarsringtheory.com]. It claims that all the movies, including the prequels, interact in a way to weave a complex pattern. This pattern is marked by repetition across a border, like an image against a mirror. It compares the composition of the movies to that of of a song, with lyrics which repeat themselves, similar but different. The article is long and full of references and well worth a read, even if you didn't like the prequel trilogy.