12 Bar Blues

Once you know a blues scale, the next step is to play it over a 12 bar blues. This chord progression is simple yet solid because it uses basic fundamental chords. Many people often add more chords to make it a little more complicated, but here is the analysis of the most basic 12 bar blues:

I / I / I / I /
IV / IV / I / I /
V / IV / I / V /

Often all the chords will be dominant 7 chords. Here again is the progression in the key of C:

C7 / C7 / C7 / C7 /
F7 / F7 / C7 / C7 /
G7 / F7 / C7 / G7 /