the song is pretty easy the first part is simple
From 0:03 to 0:12 seconds in song its like this
|------------------------|
|------------------------|
|------------------------|
|0000000000000000--------|
well not don't know entirely if thats correct but the rest of the song is like this

Riff 1
|------------------------|
|------------------------|
|------------------------|
|0-0-0-0-0-0-0-0-0-0-0-0-|

then goes into main riff which is

|-------------------------------|
|-------------------------------|
|-------------------------------|
|0-0-0-0-0-0-0-0-0-0-0-0--7--6--|