Part 1 (Acoustic)

Riff 1
e|--------------------------------|
b|-----3-3/4--------3-3/4--3------|
g|---0------------0----------3-0--| x1
d|-0------------0-----------------|
a|--------------------------------|
e|--------------------------------|

Riff 2
e|--------------------------------|
b|-----3-3/4--------3-3/4--3------|
g|---0------------0----------3-0--| x1
d|-1------------1-----------------|
a|--------------------------------|
e|--------------------------------|

Repeat Riff 1 (once)

then

e|--------------------3-----------|
b|-----3-3/4--------4-----4---3---|
g|---0------------0-----0---0-----|
d|-1------------1-----------------|
a|--------------------------------|
e|--------------------------------|