19+ D Natural Major Scale US. Pentatonic scale fluency available from amazon. The note, d repeats one octave higher.
Each scale includes the notes, diatonic triads within in the key, and the relative minor.
In music theory, a diatonic scale is a heptatonic scale that includes five whole steps (whole tones) and two half steps (semitones) in each octave, in which the two half steps are separated from each other by either two or three whole steps. After a while you'll feel it start to become more natural. If you are stuck in the pentatonic box then this is the way out of it. Notes are displayed in the fingerboard diagram with blue color with the root notes indicated by darker color.