e-----3-3----------------3-3--------------3-3--------|
b-1-1------3-3----1-1---------3-3----1-1--------3-3--|
g----------------------------------------------------|
d----------------------------------------------------|
a----------------------------------------------------|
E----------------------------------------------------|

e-----3-3----------------3-3--------------3-3--------|
b-1-1------3-3----1-1---------3-3----1-1--------3-3--|
g----------------------------------------------------|
d----------------------------------------------------|
a----------------------------------------------------|
E----------------------------------------------------|
 repeat a lot of times........