Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:7/8
K:G
['dGG gGfG edc dBAG dGG eGdG', 'DGB GAAB cBA', 'fed B2', 'BGGE DGB GAAB cBA G2 G2 GEE', 'GEE AEBE AGF']  
X:1
L:1/8
M:7/8
K:G
 dGG gGfG | edc dBAG | dGG eGdG | BAG B2 B2 | dGG gGfG | edc dBAG | dGG eGdG | BAF G2 G2 :: 
 DGB GAAB | cBA BGGE | DGB GAAB | cBA G2 G2 :: dGf eGeG | gfe dBdB | dgf edce | gfe d2 d2 | 
 fed B2 .g2 | fed B2 B2 | dcB AFAB |1 cBA G2 G2 :|2 cBA G2 GE |: DGB GAAB | cBA BGGE | DGB GAAB | 
 cBA G2 G2 :: GEE AEBE | AGF EDDE | GEE AEBE | AGF D2 D2 | GEE AEBE | AGF EDDE | dGG dGdG |1 
 cAF G2 GF :|2 cAF G2 G2 ||  