Hi! I am Carl Shepard with expertvillage.com here talking about different blues bass lines and what we do if we’re playing a bass line in the key of G particularly the box pattern, we want to take a look at where that progression comes from. It is a one-four-five progression and what I mean by that is if you take your major scale one, two, three, four, five, six, seven, eight, or do, re, mi, fa, sol, la, ti, do, you have seven different notes because do and do are the same note. That is G, this is G. So in that, if you count up your notes one, two, three, four, five, six, seven, eight, you have one, where the first progression starts, this is four where the second progression starts and then the fifth note there of the scale, so let me jump up here to the fifth, back down to the fourth and here is the first. So in any major key a one-four-five progression is going to be very popular and that is where this stems from and that is what a rock is based out of, so this is a very popular progression one-four-five.