Each pair will create two-choruses of 16-bar blues using the audio play-along "16-Bar Blues" found in the media area below. There is a two-bar count-in. Listen to the play-along track several times before starting to be sure that you 'feel' the progression. There are two choruses of the 16-bar blues: I - I - I - I IV - IV - I - I V - IV - V - IV V - IV - I - I Each player improvises 4 bars, then trades. VARIATION: The rhythm of the 'answer' much match the rhythm of the 'question' exactly.