You forgot to tell us how to write a blues song.1. Find smteohing sad.2. Write a line about this bad situation.3. Add another line that rhymes with the first line (if you can't think of one, just sing the first line again)4. Add another two lines that don't need to rhyme with anything, but tell people what you're going to do about it.5. Add in the chord changes.Play it.Example:1. [C]I feel so bad, my woman's gone2. She run and [F] left me on my [C] own3. But I'm gonna [G7] call up her best [F] friend4. And get her [C] roundThen add some words like dogone and well y'know around the place, keep adding verses that tell the story, and you have a blues song.