I don ' t know what you mean . <| sep |> Wow he looks way too old for his age then , like he transitioned from young greg to almost balding Greg really quickly ? <| sep |> Play all 12 notes over every chord and listen to the sounds produced . Some notes for example , chord tones the notes in the chord will sound good over the chord . Others might not sound so good , but might sound good if played for a short period of time leading into a good note . Some notes will even sound good over two consecutive chords , these are notes you could potentially draw out over the chord change for example . I ' m not saying don ' t work out the theory behind your chords and melody at all , but while you are waiting for an answer or figuring it out yourself you can always train your ear to recognise the unique sound each of the 12 notes makes against each unique chord This will help a lot when trying to transcribe a melody from your head that sounds good over your chord progression to the guitar , as you will recognise certain sounds as being certain notes over certain chords .