Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:6/8
K:D
['fef efe d2 F FEF GFG BAG', 'f3 fed', 'ecA gfe fed']  
X:1
L:1/8
M:6/8
K:D
|: fef efe | d2 F FEF | GFG BAG | ABd ede | fef efe | d2 F FEF | GFG BAG | ABc d2 e :: f3 fed | 
 g3 gfe | f3 fed | dcB ABd | f3 fed | g3 gfe | fef afd |1 cBc d2 e :|2 cBc d2 A |: dfa dfa | 
 cde ecA | gfe fed | Bed cBA | dfa dfa | cde ecA | gfe fed | cBc d2 A :|  