This riff is repeated through the entire song exept the second half of the
  chorus.

      1 + 2 + 3 + 4 + 1 + 2 + 3 + 4 + 1 + 2 + 3 + 4 + 1 + 2 + 3 + 4
   G|----------------|---------------|---------------|-------------|
   D|-5---5----------|33--3----------|---------------|-------------|
   A|---------5------|--------33--3--|5---5---5------|-------------|
   E|----------------|---------------|---------------|6-6-----5-5--|