Repeat Following chords.
G, D, C, D
I play optional chords for C and the second D in the progression that look like the following
(FOR THE C) 3345
A --x-------------------------------------
E --x-------------------------------------
C|---x------------------------------------|
G|----x-----------------------------------|
(THEN FOR THE SECOND D IN THE PROGRESSION) 5567
A|----x-----------------------------------|
E|----x-----------------------------------|
C|-----x----------------------------------|
G|------x---------------------------------|
Repeat these four chords over and over Enjoy