Once you know the pattern of tones and semitones used to create the C major scale, you can build a major scale on any of the twelve notes used in music. It is important to memorize this pattern, which is shown below.
The semitones are always found between the 3rd and 4th, and 7th and 8th degrees (notes) of the scale. All the other notes are a tone apart.
To demonstrate how the major scale pattern works starting on any note, here is the G major scale. Notice that the 7th degree is F sharp (F#) instead of F. This is done to maintain the correct pattern of tones and semitones and thus retain the sound of the major scale (do re mi fa so la ti do).
This example shows the G Major scale, ascending and descending, with it’s scale degrees written under the note names.