Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['DEFD GFDC B,G,B,C DEFD G3 B', 'edef gBBA B2 BA GBdB A2 Bd']  
X:1
L:1/8
M:4/4
K:G
 DEFD GFDC | B,G,B,C DEFD | G3 B dBGB | A=FDE FDCF | DEFD GFDC | B,G,B,C DEFD | G3 B AGFA |1 
 DGGF G3 F :|2 DGGF G2 Bd |: gBdg GBdg | bgag edef | gBBA B2 BA | GBdB A2 Bd | gBdg GBdg | 
 bgag edef | gd d2 ^cdBG |1 FGAF G2 Bd :|2 FGAF G3 F ||  