Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:G
['G>AB/c/ dBG', 'd>Bd dBd cAc cAc']  
X:1
L:1/8
M:6/8
K:G
|: D | G>AB/c/ dBG | Gge dBG | c>ec dBd | ABG FED | G>AB/c/ dBG | Ggf efg | a>fd ge^c | d3- d2 :| 
 d | d>Bd dBd | cAc cAc | B>dg dBG | ABG FED | d>Bd dBd | cAc cAc | Bdg dBG | c>AF G3 | d>Bd dBd | 
 cAc cAc | B>dg dBG | ABG FED | G>DG BGB | dBd g2 d | e>fg a>gf | g3- g2 ||  