this is just the first few times, i dont know what happens when it changes!
This is in Drop D For Easiness Sake:

E|----------------------------------------------------|
B|----------------------------------------------------|
G|----------------------------------------------------|
D|------7-----------9-----------7-----------7---------|
A|7--5-----5--7--5-----5--7--5-----5--7--4-----5------|
D|9-----------7-----------5-----------4---------------|
 and repeat