Looking at the C major scale again. This time in a slightly redrawn circle with all other notes and the colour scheme removed.
The IV, I and V (F, C and G) are in their positions.
What if we were to dislodge the other four notes (now being considered as minor or diminished chord root notes)?
What if we gave them a little shove to displace them and make them float free for a while?
What then if we were to give those four a small push anticlockwise so they began to nestle together with the fixed IV, I and V?
As the four move around, we clearly see that there are seven notes in total. If we wish to organise and tidy and store these, they would naturally fit together as three pairs with one left over.
Think of having seven eggs and a box that only takes half-a-dozen. We need to house our clutch but we must leave one exposed, alone, separated from its eggy-mates.
On the Circle of Fifths we can accommodate our minor chord root notes by creating three new little homes and slotting them right into place.
All that remains, given that we are considering these are root notes of chords, is to complete the labels.
On the outer wheel are the IV, I and V major chords we ascribed as being ‘fixed in position’ earlier.
On the newly created inner we have the ii, vi and iii minor chords.
Plus the diminished chord.
Poor unhappy chappy.
Billy no mates.
The lone soul with no place to call home.
Even its name suggests its deprived status – diminished.