When playing the 12 bar blues the guitarist should be prepared to ‘kick it off’ the song. The kickoff or intro is usually two bars long, sometimes four bars. The intro is actually the last two bars of the 12 bar blues. Some call this ‘coming in through the back door’.

intros_in the key of G_1

intros in the key of G_2

intros in the key of A_1

intros in the key of A_2

intros in the key of A_3