Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
Q:1/2=76
M:2/2
K:Bb
['B2 B2 Bdce d2 d2 dfeg fbag', 'DBFB DBFB EBGB EBGB']  
X:1
L:1/8
Q:1/2=76
M:2/2
K:Bb
 F | B2 B2 Bdce | d2 d2 dfeg | fbag fedc | dBfd ecBA | B2 B2 Bdce | d2 d2 dfeg | fbag fedc | 
 B2 B2 B3 :: FE | DBFB DBFB | EBGB EBGB | EecA EecA | DfdB DfdB | DBFB DBFB | EBGB EBGB | 
 DfdB CecA | B2 B2 B2 :|  