"1st riff"
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|---4-4-4-4--5-5-5-5--4-4-4-4--5-|
A|---4-4-4-4--5-5-5-5--2-2-2-2--3-|
E|---2-2-2-2--3-3-3-3-------------| 2X

"2nd Riff" (This is played only once)
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|---4-4-4-4--5-5-5-5--5---4------|
A|---4-4-4-4--5-5-5-5--3---2------|
E|---2-2-2-2--3-3-3-3-------------| 1X

"1st riff again"
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|---4-4-4-4--5-5-5-5--4-4-4-4--5-|
A|---4-4-4-4--5-5-5-5--2-2-2-2--3-|
E|---2-2-2-2--3-3-3-3-------------| 1x

"1st Riff again"
"I wanna be (6X)... Pretty"
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|---4-4-4-4--5-5-5-5--4-4-4-4--5-|
A|---4-4-4-4--5-5-5-5--2-2-2-2--3-|
E|---2-2-2-2--3-3-3-3-------------| 1x

3rd riff
"Down"
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|---6--6-7---6--6-7---7-9----8---|
A|---4--6-7---4--6-7---7-7-9--6---|
E|------4-5------4-5---5---7------| 2X

And pretty much that's all you need to know
E|-----------------------------------------------|
Here is the order of it all if you need a bit more clarification.