Thanks to Boldra who refined my original understanding of this song.
Intro
D:|-----------|------------------
G:|-----------|------------------
A:|-------7---|------------------
E:|-0-3-7---8-|-888753-----------
Main riff
D:|------------------------|------------------------|
G:|------------------------|------------------------|
A:|-------7-755557---------|-------7-755557---------|
E:|-0-3-7------------------|-0-3-7------------------|
D:|------------------------|------------------------|
G:|------------------------|------------------------|
A:|-------7-755557---------|-------7-755557---------|
E:|-0-3-7------------------|-0-3-7------------------|
D:|------------------------|------------------------|
G:|------------------------|------------------------|
A:|-------7-755557---------|-------7-755557---------|
E:|-0-3-7------------------|-0-3-7------------------|
D:|------------------------|------------------------|
G:|------------------------|------------------------|
A:|-------7-755557---------|-------7-755557---------|
E:|-0-3-7------------------|-0-3-7------------------|
repeat many times
just keep repeating.↓