Let's review the Blues Scale in the key of A. Remember you can use this scale over major or minor chords. It all depends on the sound you are going for.
Here’s the first riff using the A Blues Scale.
I can play this riff in another position.
And here’s another place I can play the same exact riff.
If I use the Extended Am Pentatonic scale, I can attach all three riffs. First let's review the scale.
Now attach all three licks. Play along with the video to get the feel for this.
Here’s another Blues riff ala Stevie Ray Vaughan.