The 12 bar Blues has two basic forms. The chords can used from Minor and Major chords. We have looked at power chords and 6th and 7th notes.
Lets use the C major scale and chords. From the 12 bar basic structure we use the 1st , 4th and 5th chord
From the C major we get 1st= C= Root 4th= F 5th= G
Lesson one from is this
Bars One to Four is the 1st Chord Bars Five and Six is the 4th chord Bars Seven and Eight is the 1st Chord Bar Nine is the 5th Chord Bar 10 is the 4th Chord Bar 11 is the 1st chord Bar 12 is the 5th chord