This is quiet simple...


G|----------------------------------------------------------------------------|
D|------3--3--4-----3--4------------------------------------------------------|
A|----3--3--------3-----------------------------------------------------------|
E|----------------------------------------------------------------------------|

Again and again...


If you want to change:

G|------------------------------------------------------------------------------|
D|------------------------------------------------------------------------------|
A|------8--8--9----8--9---------------------------------------------------------|
E|----8--8-------8--------------------------------------------------------------|

Good Luck!!