I am still learning new and different techniques as well. The 36251 are the numbers for different tones of a scale. Remember F-1,G-2,A-3,B-4,C-5,D-6,E-7,F-8. Chord tones played as a major chord are 1,4 and 5 while minor chords tones are 2,3 and 6 while the 7th tone is played as diminished in this particular scale. As you play around with this progression look at the circle of fifths and how each tone relates to it as well. Align the numbers on the circle of fifths and note the positions of the numbers in comparison to progression. I hope this helps.