Watch the Two Lines online guitar lesson by TrueFire from Play Acoustic Guitar 6: Lick Lexicon
Two Lines - Lick #12 is a video guitar lesson presented by Joe Dalton and is sourced from 50 Acoustic Blues Licks You MUST Know.
This turnaround lick features an ascending bass line and a melody over the top being played simultaneously. I often think of these licks as multiple positions. For instance, picture the first set of double stops as one chord, then picture the next position as a chord. The other melody notes are added to the position you just played. Both of these melodies are familiar and predictable. Being able to play them at the same time may take some practice.