I7–IV7
The most stripped-down blues movement: two dominant seventh chords rocking back and forth. This raw, minimal approach is the foundation of many one-chord and two-chord blues vamps.
Pattern: I7 – IV7
Example in C Major: C7 – F7
Choose a Key
Song Examples
- Rollin' and Tumblin' — Muddy Waters
- Crawling King Snake — John Lee Hooker