Here, we have a bluesy melody line to finish up the piece. This riff revolves around the 1st and 5th modes of the E minor pentatonic scale.
Be sure to notice how you won't be picking every single note in this riff. We have some good use of legato with hammer-ons and pull-offs.
And lastly, be sure to give some crazy vibrato to the quarter note in bar 18 (12th fret G string).