Riff A:

G----------------------------------------------------------------|
D----------------------------------------------------------------|
A----------------------------------------------------------------|
E--2-2-2-2-2-2-2-2-1-1-1-1-1-1-1-1-/4-4-4-4-4-4-4-4-/12-12-12-12-|

G----------------|
D----------------|
A----------------|
E--12-12-12-12---|

G----------------------------------------------------------------|
D----------------------------------------------------------------|
A----------------------------------------------------------------|
E--5-5-5-5-5-5-5-5-4-4-4-4-4-4-4-4-/7-7-7-7-7-7-7-7-/12-12-12-12-|

G----------------|
D----------------|
A----------------|
E--12-12-12-12---|

Riff B:

G--------------------------------------------------------------|
D--------------------------------------------------------------|
A--------------------------------------------------------------|
E--7-7-7-7-7-7-7--5-5-5-5-5-5-5--3-3-3-3-3-3-3--0-0-0-0-0-0-0--|

Near the end of the "song", that riff is played with a varied rhythm:

G-----------------------------------------------------------------|
D-----------------------------------------------------------------|
A-----------------------------------------------------------------|
E--7-7--7-7-7-7-7--5-5--5-5-5-5-5--3-3--3-3-3-3-3--0-0-0-0-0-0-0--|

The song ends with riff A, bending those high E notes when coming to
the song's completion.

Enjoy!