This tab was fairly easy, but kinda tricky when it gets to the switching. 
Be sure to pay extra attention to the piano's low notes & you should be 
able to follow perfectly!
_____________________________________________________________________________
RIFF 1

G|-----------------|
D|-8~~5~6~~8~~5~6~~|
A|-----------------|
E|-----------------|
B|-----------------|

RIFF 2

G|--------|-------|
D|-----6~~|-------|
A|-4~6~---|4~6~---|
E|--------|----6~~|
B|--------|-------|

G|--------|-------|
D|-----6~~|-------|
A|-4~6~---|4~6~8~~|
E|--------|-------|
B|--------|-------|

*Repeat Riff 1*

RIFF 3

G|--------|-------|
D|-----6~~|-------|
A|-4~6~---|4~6~---|
E|--------|----6~~| x3
B|--------|-------|

G|---------|-------|
D|-----6~7~|-------|
A|-4~6~----|4~6~8~~|
E|---------|-------|
B|---------|-------|