A new octave starts at fret 12, that's why the pattern only starts to repeat itself at fret 12. It takes a while to learn a scale all over the fret board due to this. These number things I'm posting are only the open string positions for a scale.
Devils interval is basically the interval between the open E string and the 1st fret of the A string, on your bass that would be open B string and the first fret of the E string.
A good really spooky sounding scale is Phygrian Dominant (Also known as the 5th mode of a Harmonic Minor):
124
023
023
014
or a perhaps even spookier variation:
124
123
023
014
I only recently figured why the 12th fret is marked so notably on the fretboard... it's the same note when pressed down or open.
But those notes in B-tuning would be... 5th fret on the B-string and 6th fret on the E-string. So this is what I'm confused about.
But then what frets after that when going right?