Watch the Chicken Picking 4 online guitar lesson by Joe Dalton from 100 Twang Thangs
These phrases are almost entirely in the major pentatonic. The notes borrowed from the minor pentatonic are the flatted sevenths. Although the phrases are simple, they are effective. Remember that the listeners need to hear something they can grasp. Sometimes less is more. Spend some time getting the feel just right and the notes crystal clear.