Create a musical composition that adheres to the provided structure and theme.
X:1
L:1/16
M:2/4
K:Bb
['BcBF DFDF', 'fgfd BdBd', 'a2e2d2c2 B4', '[AA]2A2c2A2 B4'  
X:1
L:1/16
M:2/4
K:Bb
|: BcBF DFDF | BcBF DFDF | BdcB cedc | dfed cBAG | BcBF DFDF | BcBF DFDF | Bdfd cege | dcBA B4 :: 
 fgfd BdBd | fgfd BdBd | bagf gfed | edcB BAGF | fgfd BdBd | fgfd BdBd | (ba).g.f (gf).e.d | 
 ecBA B2B,2 ::[M:2/4][K:A] a2e2d2c2 | B4 B2c2 | B4 E4 | a2e2d2c2 | B4 c2d2 | e4 E4 | 
 !fermata![AEA,]8 :: [AA]2A2c2A2 | B4 B4 | [AA]2A2c2A2 | B4 E4 | [AA]2A2c2A2 | B4 a4 | g2f2e2^d2 | 
"_Da Capo" e8 |]  