Progression
The 12-bar blues (quick change) in F major
12-bar blues (quick change) in F major plays F7, Bb7 and C7 — I, IV and V — across 12 chords. The same twelve-bar blues form, ending back on the I chord for the last two bars instead of turning around on V — common when a band is vamping into a repeat.
The chords, in order
Bar 1F7I
Bar 2Bb7IV
Bar 3F7I
Bar 4F7I
Bar 5Bb7IV
Bar 6Bb7IV
Bar 7F7I
Bar 8F7I
Bar 9C7V
Bar 10Bb7IV
Bar 11F7I
Bar 12F7I