Progression
The I–IV–V in C major
I–IV–V in C major plays C, F and G — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.
The chords, in order
1CI
2FIV
3GV
4CI
I–IV–V in C major plays C, F and G — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.