I added this tab because the song is originally in Drop A tuning.
This is the standard tuning riff fo beginners.
[Intro] Main Riff
e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|--6--4---------------------------------------------------------------------|
D|--------6--6--7--9--6--6--7--9--6--6--4--4--6--6---------------------------|
A|---------------------------------------------------------------------------|
E|---------------------------------------------------------------------------|