Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:9/8
K:D
['FGF FED', 'D B=cB BAG FGA B2 E E2', 'fgf fed', 'd gfe dcB AGF B2 E E2']  
X:1
L:1/8
M:9/8
K:D
|: FGF FED G2 E | FGF FED E2 D | FGF FED G2 B | AFD DEF E2 D :: B=cB BAG FGA | B2 E E2 F G2 B | 
 ABc dcB ABc | d2 D DEF E2 D :: fgf fed g2 e | fgf fed e2 d | fgf fed g2 b | afd def e2 d :: 
 gfe dcB AGF | B2 E E2 F G2 B | ABc dcB ABc | d2 D DEF E2 D :|  