main riff:
  G                    G                   C                   G
G|--------------------|-------------------|-------------------|-------------------|
D|--------5-3-0-3-0---|--------5-3-0-3-0--|--------5-3-0-3-0-5|--------5-3-0-3-0--|
A|------5-----------3-|------5-----------3|3-3-3-5------------|------5-----------3|
E|3-3-3---------------|3-3-3--------------|-------------------|3-3-3--------------|