Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=120
M:3/4
K:G
['', 'd>e dBGB', 'TB6 A>B AFDF A>B AcBA B>c BGDG']  
X:1
L:1/8
Q:1/4=120
M:3/4
K:G
 D"^NB1" |: G>A GDB,D | G>A GFGA | B>c BGDG | B>c BABc | d>e dBGB | d>e dBGB | dBedcB | BAGFED | 
 G>A GDB,D | G>A GFGA | B>c BGDG | B>c BABc | d>e dBGB | d>e dBGB | dBedcB | TB6 :: A>B AFDF | 
 A>B AcBA | B>c BGDG | BdcBAG | ecAcec | dBGBdB | ecBAGF | TF4 G2 :|  