Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:G
['BcB BAG', 'd e2']  
X:1
L:1/8
M:6/8
K:G
 dc | BcB BAG | Bcd e2 d | BcB BAG | A2 A Adc | BcB BAG | Bcd e2 d | BcB ABA |1 G3- G :|2 
 G2 d e2 f || g2 d e2 d | g2 d e2 d | BcB BAG | A2 A A2 d | g2 d e2 d | g2 d e2 d | BcB AGA |1 
 G2 d e2 f :|2 G3- G ||  