Compose music that adheres to the provided musical structure and theme.
X:1
L:1/8
M:2/4
K:Bb
['D/E/ FFF=E/F/ BBBc/B/ Acfe d2 z d']  
X:1
L:1/8
M:2/4
K:Bb
 D/E/ | FFF=E/F/ | BBBc/B/ | Acfe | d2 z d | d^FFF | GAB=B | c=EEE | F2 z F | ecdB | ABcF | Bded | 
 c2 z f | ddBB | cdec | dcBA | B2 z |]  