Fig. 1: C Major Scale
Fig. 2: Triads Built From C Major Scale
I. ) C Major
ii.) D minor
iii.) E minor
IV.) F Major
V.) G Major
vi.) A minor
vii dim .) B dim.
Fig. 3: Example
Here is a sample progression built from the C major scale/chord system on this page. It also serves to show that a progression doesn’t always have to begin with the 1st (tonic) chord.
G – C – G – C – F – G – C