The vast majority of blues songs (and rock and roll songs) are based on a
twelve bar pattern which is repeated. Over time there have been many
variations on this pattern.
 |
 |
 |
A |
A |
A |
A |
D7 |
D7 |
A |
A |
E7 |
D7 |
A |
E7 |
Play each chord 4 times.
Once you get to the end of the pattern, you can go straight back to the
beginning or finish up with one strum of the root chord (in this case A).
