If this is not in the right place, please move it. I was thinking about bridges in songs the other day and I wondered, what is a bridge based on? I mean, how does one come up with a bridge part? I don't have much knowledge of theory, so it may be hard for me to even understand any answers to this question. The songs I have been writing don't have a bridge part. They generally follow the following pattern: verse variation as an intro > verse > chorus > verse > double chorus > verse variation as an outro. I know there are no rules to writing your own music and there are a lot of songs that don't have a bridge, but if I wanted to throw one into one of my songs, is there a "formula" for doing it?