Compose a piece of music that combines the given melodic theme with the assigned alphabetical pattern.
X:1
L:1/8
M:3/2
K:Bb
['BdBd DEFD E2', 'A2 F2 DFBF']  
X:1
L:1/8
M:3/2
K:Bb
|: BdBd DEFD E2 C2 | BdBd FBAc B2 B,2 | BdBd DEFD E2 gf | edcB FBAc B2 B,2 :: Bdgd BdcB A2 F2 | 
 DFBF GFGE D2 B,2 | B2 g2 B2 f2 A2 F2 | DFBF DBAc B4 :|  