Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=300
M:6/8
K:G
['gfe edB', 'd2 B']  
X:1
L:1/8
Q:1/8=300
M:6/8
K:G
 f | gfe edB | gfg GAB | gfe edB | dBA A2 f | gfe edB | gfg a2 b | gfg efg | dBG G2 :: B/c/ | 
 d2 B d2 B | gfg GAB | d2 B d2 g | ecA ABc | d2 B d2 B | gfg a2 b | gfe efg | dBG G2 :|  