Today's guitar lick uses tremolo picking. We are still using the E minor scale and the backing track we have been looking at all week. Tremolo picking involves rapidly picking the same note. The best example I can think of to demonstrate true mastery of this guitar technique is Eddie Van Halen's tremolo picking run in "Eruption" from Van Halen's first album.
If you are interested here is a guitar improv I did using some of the licks we have looked at this week over the backing track: