[Main riff]
E|---------------------------------|
B|---------------------------------|
G|--------6------------------------|
D|------------------5---4----------|
A|---------------------------------|
E|--0-------5---------4------------|

[After playing that riff for a while]
E|--------------------|
B|--------------------|
G|-----6-----6--------|
D|-----0-----5--------|
A|-----5-----5--------|
E|-----------5--------|

[Second riff]
E|------------------------------|
B|------------------------------|
G|-----6-----6------------------|
D|-----0-----5------4-------4---|
A|-----5-----5------0-------4---|
E|-----------5------0-------4---|

[As it builds, mess around with feedback and theses two notes]
E|--------------------|
B|--------------------|
G|-----4-----6--------|
D|--------------------|
A|--------------------|
E|--------------------|