Even this more complicated loop with 8 chords can be broken down into a three basic parts, using three scales as the basis for to improvisation. Again, you practice the scales over the loop, and when you're getting comfortable with that, you start to build phrases, and improvise. What is shown here in a couple of minutes, you can do for as long as it takes: the loop does not get tired, and has infinite patience: that makes it a enjoyable and effective way of practicing!

Extensive explanations, example, notation, videos all in this course: D Major Bossa.