In Lesson 6 you were introduced to the style of playing riffs over a chord progression. The following example, riff one, is played against the 12 Bar Blues in the key of A.
For each bar of the A chord, riff one starts at the A note on the 5th fret of the 4th string. Play this riff slowly and smoothly, using the correct fingering.
When the progression changes to a D chord (bar 5) the riff moves across to the third string, starting on the D note (5th fret). You will notice that the fingering is still the same and that the basic "shape" of the riff has not altered.
For the E chord (bar 9), the riff shape begins on the third string at the 7th fret. Once again, the fingering and basic riff shape remain the same.
Here is the complete 12 bar in A.