Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/4
M:3/4
K:D
['d e', 'a a'  
X:1
L:1/4
M:3/4
K:D
 d d e | c3/2 d/ e | f f g | f3/2 e/ d | e d c | d3 :: a a a | a3/2 g/ f | g g g | g3/2 f/ e | 
 f g/f/e/d/ | f3/2 g/ a | b/a/g/f/ e | d d2 :|  