Here is a guitar lesson from my Youtube channel on how to play a highly useful country lick using a series of pull offs in groups of six notes. I teach this lick to some of my advanced students here in Vancouver. This one is pretty tough unless you have some experience playing fast lines with lots of pull-offs.
You can easily transpose this line to other keys so long as the open strings work in that key. In this video I play the lick first in G minor pentatonic, then in A minor pentatonic, then in A major pentatonic. It probably works in others as well you just have to calculate which open strings will work in the key.
Here's that lick tabbed out from Guitar Pro: