Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/8=90
M:6/8
K:Gmin
['d3 bag', 'z dcB d2 e fge f3 cBA']  
X:1
L:1/8
Q:3/8=90
M:6/8
K:Gmin
"_Keysig one flat in book" g/^f/ | g2 d d2 c | BAB G2 d | gab abg | a3 d3 | bag f2 _e | d3 bag | 
 fg_e dec | B3- B2 ::"^NB" z | dcB d2 e | fge f3 | cBA c2 d | _efd e2 g/a/ | bag ^f2 g | 
 d3- d2 _e | d_ec BcA | G3- G2 :|  