Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:G
['dcB dcB', 'e dcB GAG']  
X:1
L:1/8
M:6/8
K:G
 dcB dcB | dcB d2 e | dcB dcB | cAB c2 e | dcB dcB | dcB def | gfg dcB | cAB c2 e :: dcB GAG | 
 dBc d2 e | dcB GAG | cAB c2 e | dcB GAG | dBc def | gfg dcB | cAB cde :|  