G     D       Cadd9
E|--3----------------------------------------------------------|
B|----3--------3-----------------------------------------------|
G|-----------2-----------0-----0-------------------------------| Repeat 4x
D|---------0-----------2-----0-----0---------------------------|
A|-----------------0-3-----2-----0-----------------------------|
E|-3-----------------------------------------------------------|

Part when singing starts
   G     D     Cadd9
E|---3---------------------------------------------------------|
B|---3---3-3--------------------------------------------------|
G|---0---2-2--------0-----0-----------------------------------|
D|-------0-0------2-----0-----0-------------------------------| Repeat
A|------------0-3-----2-----0---------------------------------|
E|-3----------------------------------------------------------|

Went into his room...         Build on last D chord
E|---3-3-3-3-3-2-2-2-2-3-3-3-2--------------------------------|
B|---3-3-3-3-3-3-3-3-3-3-3-3-3--------------------------------|
G|---0-0-0-0-0-2-2-2-2-0-0-0-2--------------------------------|
D|-----2-2-0-0-0-0-0-0-2-2-0-0--------------------------------|
A|-----3-3-2-2---------3-3-2----------------------------------|
E|-3-------3-3-------------3----------------------------------|

Power chord Part 
E|------------------------------------------------------------|
B|------------------------------------------------------------|
G|---------7-77777-555-4--------------------------------------| Repeat a bunch of times
D|-5-55555-7-77777-555-4-77-----------------------------------|
A|-5-55555-5-55555-333-2-77-----------------------------------|
E|-3-33333---------------55-----------------------------------|
    *****   *****