Snake Chapman's Tune -- Chord Progression

A
(play 4 times) 
  D (I) - D (I) - D (I) - D (I)
  D (I) - D (I) - A (V) - D (I)

B 
  D (I) - D (I) - C (VII) - G (IV)
  D (I) - D (I) - C (VII) - G (IV)
  D (I) - D (I) - C (VII) - G (IV)
  A (V) - A (V) - D (I)   - D (I)