 Okay, so we've gone through finding roots and fifths. We've used the octave a bit and we've primarily gone through our tune using half notes. And incidentally, when you're playing jazz, this is a great little lesson to know. The first time through a tune when the horn player is playing the melody, and we call that the head in jazz, it's really appropriate on bass to play half notes while the head is being played. But then when guys start improvising and you're playing behind the improvisation, usually in a swing tune you want to get to more of a quarter note pattern. So let's just take a minute to do roots and fifths with the octaves using quarter notes for each measure instead of half notes for each measure. It's basically the same thing, but we're essentially playing twice as fast as we just did. So for each measure you'll have one, two, three, four, one, two, three, four. Before we were going one, two, three, four, one, two, three, four. So it's just essentially double time, playing quarter notes. And this is kind of the beginning of feeling like we're playing a walking bass line over chord changes. Let me show you what I'm talking about and then you can give it a try on your own. Starting on B-flat root, root, fifths, root, fifths, root, fifths, root, fifths. Third bar, fourth bar, F, top of the tune, B-flat, second bar. Third bar, fourth bar, E-flat, for two bars, back to B-flat, F, B-flat, F. Now you're really starting to play something that sounds like a walking bass. Practice that, get really good at playing roots, fifths, and octaves in both half notes and quarter notes. You can even mix up the two a little bit as you're improvising to really begin making it kind of different every time you play through the tune.