Compose a piece of music following the specified structure and theme.
X:1
L:1/4
M:3/4
K:D
['a b g', 'd2 A/B/c/d/ e d/e/f/g/ a A/B/c/d/e/c/'  
X:1
L:1/4
M:3/4
K:D
 a | b g g | f2 a | b g g | f2 a | b g e | a f d | g e c | d2 :: A/B/c/d/ e | d/e/f/g/ a | 
 A/B/c/d/e/c/ | d2 :|  