Well, the normal approach is to just return through your screens until you return from your entry point. Make each of the screen's functions return a special value that is checked by the caller, which then returns a special value to its caller, etc.
The stop statement will terminate your channel, but this is not a recommended approach. It makes your channel appear to have crashed. I don't think this actually has any detrimental effect right now but it's not recommended.
--Mark
