riff A (chords)
E|-------------------------------------------------------|
B|-------------------------------------------------------|
G|-------------------------------------------------------|
D|-2---2---2---2---2---2---3---3---3---2-----------------|
A|-2---2---2---2---2---2---3---3---3---2-----------------|
E|-0---0---0---0---0---0---1---1---1---0-----------------|

riff B (lead)
E|-------------------------------------------------------|
B|-------------------------------------------------------|
G|-9-7-------9-7------10-9---------10-9------------------|
D|------5h7------5h7--------10h12-------5h7--------------|
A|-------------------------------------------------------|
E|-------------------------------------------------------|

riff C (lead) (play it with riff D together)
E|-------------------------------------------------------|
B|-------------------------------------------------------|
G|-9-7------9-7------7-9-10--9--------10-9---------------|
D|-----5h7------5h7------------10h12-------5h7-----------|
A|-------------------------------------------------------|
E|-------------------------------------------------------|

riff D (chords) (ending riff)
E|-------------------------------------------------------|
B|-------------------------------------------------------|
G|-------------------------------------------------------|
D|-2-----2-2---2-----2-2---2-----2-2---2-----2-2---------|
A|-2-----2-2---2-----2-2---2-----2-2---2-----2-2---------|
E|-0-0-0-0-0---0-0-0-0-0---0-0-0-0-0---0-0-0-0-0---------|
    x x         x x         x x         x x
                                                (2x)
E|-------------------------------------------------------|
B|-------------------------------------------------------|
G|-------------------------------------------------------|
D|-3-----3-3---3-----3-3--3-----3-3-----------2----------|
A|-3-----3-3---3-----3-3--3-----3-3---(2x)----2----------|
E|-1-1-1-1-1---1-1-1-1-1--1-1-1-1-1-----------0----------|
    x x         x x        x x