A "rock blues" in a minor key moves along at up to 120 beats-per-minute using minor seventh chords. The harmony stays on the Im-chord for bars one through four, then in bars five and six switches to the IVm-chord, before going back for two more bars of Im-chords in bars seven and eight. Then it descends from a V-chord in bar nine, to a bar of IVm-chord in bar ten, to a Im-chord in bar eleven and back to the V-chord for bar twelve.
