Progression
The 12-bar blues (quick change) in D major
12-bar blues (quick change) in D major plays D7, G7 and A7 — 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 1D7I
Bar 2G7IV
Bar 3D7I
Bar 4D7I
Bar 5G7IV
Bar 6G7IV
Bar 7D7I
Bar 8D7I
Bar 9A7V
Bar 10G7IV
Bar 11D7I
Bar 12D7I