Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:G
['G3 F', 'D2 BddB G3 A BddB cAAG BddB', 'GEDE c3 A']  
X:1
L:1/8
M:4/4
K:G
 G4 G3 A | BAGA BAAB | G3 F GFGA | BAGE EDDE | G3 F G3 A | BAGA BAAB | G3 F GFGA | BAGE ED D2 |: 
 BddB G3 A | BddB cAAG | BddB GGGA | BAGE EDDG :| GEDE c3 A | B3 G AcBA | GEDE c3 A | BAGE EDDE :|  