Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/4
Q:3/4=90
M:6/4
K:D
['f3/2 e/ d a2 A', '=c B3/2 A/ G F3/2 E/ D'  
X:1
L:1/4
Q:3/4=90
M:6/4
K:D
 f | f3/2 e/ d a2 A | e e e e2 g | f3/2 e/ d a2 A | d d d d2 || =c | B3/2 A/ G F3/2 E/ D | 
 e e e e2 =c | B3/2 A/ G F3/2 E/ D | d d d d2 |]  