Hi Here is a practice track for Bass players. Building on our G major scale knowledge, this track uses an Am7 and a Bm7 chord, the II chord and the III chord of the G major scale. Start building a bass line with your root notes, and when you are comfortable with knowing where all your rote notes are in a position, add other chord tones. To find the chord notes, first you need to know your G major scale. Then starting at the root note of the chord, take every second note up the scale for four notes. These are the chord notes!
The track follows this sequence, and the first chord you here is Bm7.
||:Am7 | |Bm7 | :||