Here is a second example of some different patterns.
Click this link to open the pdf, which you can either view in a separate screen or print out:
Bass Run & Fill No21. In bars 1 & 2 the bass follows this pattern:
Tonic (G) , major 7th (F#), 6th (E), dominant (D)
2. In bars 3 & 4 there is an exciting structure which goes from G, through G# to A, using the diminished chord to change the fundamental of the G major chord to G#, without changing the other notes of that chord.
3. In bar 5 we use Am, but this could also be a C6.
4. In bars 6 to 8, we use the combination of G major, E minor, A minor, D7, G major, which comes straight from the Circle of Fifths.
5. Bar 8 uses the same fill as Bass Run No1
Peter