Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:2/4
K:D
['D2 (d/e/).f/.d/ ec A2 B2 (B/c/).d/.B/ AG', 'd2 ff/g/ af ee/f/ g2 dd/e/ fd'  
X:1
L:1/8
M:2/4
K:D
 D2 (d/e/).f/.d/ | ec A2 | B2 (B/c/).d/.B/ | AG F2 | GABc | defg | fedc | d2 d2 :| ff/g/ af | 
 ee/f/ g2 | dd/e/ fd | (c/d/).e/.c/ A2 | dd/e/ cc/d/ | BB/c/ A2 | Bgfe | d2 d2 :|  