Compose a piece of music that adheres to the specified alphabetical framework and includes the provided theme.
X:1
L:1/16
M:2/4
K:F
['dBdg fedc fgaf', 'fagf gedc gabg']  
X:1
L:1/16
M:2/4
K:F
|: c2(AB c2)fe | dBdg fedc | fgaf d2ga | bgaf fedc | c2AB c2fe | dBdg fedc | fgaf dbag | fage f4 :: 
 fagf gedc | gabg afcA | BdgB AcfA | GABc BAGF | fagf gedc | gabg agfe | fac_e dbag | afg=e f4 :|  