The major scale is a series of 8 notes in alphabetical order that has the familiar sound:
The C major scale contains the following notes.
The distance between each note is two frets except for and
where the distance is only one fret.
The distance of two frets is called a tone (sometimes called a step), indicated by T.
The distance of one fret is called a semitone (sometimes called a half step), indicated by S.