I called it 3rd, 4th, 5th, 6th, because I didn't have a good enough name for it at the time. Each number represents a chord within the key. There are four numbers so that means that there are 4 principle chords. If you come up with a decent name for it email me at [email protected] I wrote this one a long time ago, and I sent it in because someone who thought it was great convinced me to.