On to our first approach of using 4th intervals.
Although I'm calling these "4ths" they are more like inverted 5ths because in most cases we'll be playing the root and 5th of the current chord.
Pay close attention to how these intervals work over the chords.
It's easy to think of these as being part of the pentatonics but I see them as being part of the chord and try to see many of the money makers the same way.
The first example with emphasize the 5th and root of the C chord.
The second fill will emphasize the 5th and root of the G chord.
The third fill will emphasize the 5th and root of the Am chord.
The fourth fill will emphasize the 5th and root of the F chord.