Codes and conventions and purposes of title sequences

All types of genres will have ways that we can recognise them, similar features this is how we classify different media texts into groups
These are called coeds and conventions.
Codes:
A code is like a really firm rule that is almost never broken there can be: Character Codes, Plot Codes, Structural Codes, Cultural Codes, Production Codes
Conventions:
Conventions are habits or long accepted ways of doing things these can change a lot as a genre develops but if you change to many or too quickly the audience may not understand what you are doing.
          What are the purposes of title sequences:

• To introduce the programme.
• Tells us the genre/sub-genre of the show.
• Tells us location/setting.
• Tells us information about the characters.
• It's a warning that the shows about to start.
• It gives the show a recognisable identity.
• It can give the information about the tone/style/pace.
• Tells us the period of time the show is set in.