Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:Bb
['f2 d', 'DFB DFB EGB EGB Ace ecA']  
X:1
L:1/8
M:6/8
K:Bb
 b2 f dBd | f2 d f2 d | b2 f dBd | c2 A c2 A | b2 f dBd | f2 d f2 d | gfe dec | B3 B,3 :: DFB DFB | 
 EGB EGB | Ace ecA | Bdf f3 | DFB DFB | EGB EGB | Ace ecA | B3 B,3 :|  