Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:6/8
K:F
['B2 c dBG', 'B GFD B2 c dBG AGA FAc', 'AGA FAc fed cAF'  
X:1
L:1/8
M:6/8
K:F
|: GFD B2 c | dBG GFD | G2 A B2 c | dBG G2 B || GFD B2 c | dBG AGA | FAc fed |1 cAF FGA :|2 
 cAF F2 c |: dfd cec | BdB{B} AGF | G2 A B2 c | dBG G2 c ||1 dfd cec | BdB AGA | FAc fed | 
 cAF FAc :|2 dBd fed | cdB AGA | FAc fed | cAF FGA |]  