He has 5 main codes:
Enigma code- This is where there are subtle hints dropped that help add mystery to the of the plot line. These hints then all come together at the end of the film to help solve the viewers confusion. They also help to keep the viewer hooked through the film.
Action Code- This helps to gain attention from the viewer and also helps to keep them hooked.
Semantic Code- This code refers to the connotations that are being given throughout the storyline.
Symbolic Code- This is also similar to the semantic code but is on a lot wider basis.
Referential Code- This usually involves some relevance directed from some sort of religion and is used by linking with cliches, sayings and proverbs.