Here is a rhythm part using the basic movable shuffle pattern as the lower part and a two bar charleston rhythm as the higher part. This gives the illusion of two guitars playing simultaneously To get both parts sounding clearly you will need to fret a full bar chord with the first finger and take care to hit the correct strings with the right hand.
Here is another two guitar imitation, this time in the key of E. This example moves back and forth between two rhythm patterns. The turnaround is played with the pick and fingers.