Main Riff- through the whole song-

G--------------------------
D--------------------------   
A--------------------------    REPEAT
E--7-8-9--0-1----7h7-8-9---
   *--->         *

7 hit is very fast- like a grace note to the actual 7

* in those spots you can do a hammer-on- it's optional, but it makes it sound more like the song- (The actual song, I think is done with synth, so- you wont get the exact sound)
Variation- later in the song

G---------------------------------------------------------
D---------------------------------------------------------
A---------------------------------------------------------
E--7-8-9--0-1---------------7-8-9--0-1----------7h7-8-9---

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