Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:6/8
K:G
['B3 BAG F2 d d^cd', 'g3 b2']  
X:1
L:1/8
M:6/8
K:G
 B3 BAG | F2 d d^cd | B2 g gfg | eag fed | B3 BAG | F2 d d^cd | ede fef | agf g2 d :| g3 b2 d | 
 g3 b2 g | fag fed | fag fed | g3 b2 d | g3 b2 g | fag fef | agf g3 :|  