Compose a piece of music that adheres to the specified alphabetical framework and includes the provided theme.
X:1
L:1/8
Q:1/4=180
M:2/4
K:Bb
['', 'B,B, D2']  
X:1
L:1/8
Q:1/4=180
M:2/4
K:Bb
"^A" B,B, |: D2 F2 | z FFD | F4- | F2 B,B, | D2 C2 | z FFD |1 D4- | D2 B,B, :|  