All chords are created with the help of the two words (Bright and Dark).

Bright: Is when after pressing a key you are starting from then you skip three keys, you press another key.

Dark: Is when after pressing a key you skip two keys then you press another key.

It is from this, that we create either a major chord, minor chord, dimished chord or augmented chord.

The formulars for this are: Bright then Dark = Major Chord

Dark then Bright = Minor Chord

Dark then Dark = Dimished Chord

Bright then Bright = Augmented Chord