Play all the chords of C major!
The chords of any major scale follow this pattern: I, ii, iii, IV, V, vi, vii(dim), I
Chords in the key of C are: C Major, d minor, e minor, F Major, G Major, a minor, b diminished and C Major
The chords of any major scale follow this pattern: I, ii, iii, IV, V, vi, vii(dim), I
Chords in the key of C are: C Major, d minor, e minor, F Major, G Major, a minor, b diminished and C Major