Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:3/8
K:G
['BAA/B/ cBG']  
X:1
L:1/8
M:3/8
K:G
 G | GDB | BGd | dcB | BAA/B/ | cBG | BAA/B/ | cBG | BAG/B/ | d2 e | d>cB | edF | G2 |]  