Watch the Uptempo Shuffle Blues online guitar lesson by Steve Trovato from 50 Voodoo Blues Licks You MUST Know
This lick has its roots in blues rock and is a driving double stop riff that uses the technique of repetition to drive it home.
Use hybrid picking. Play strings 1 and 2 using your middle and ring fingers. Play the third string with your pick. Of course it also may all be played using a pick.