Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/4
M:3/4
K:G
['B A']  
X:1
L:1/4
M:3/4
K:G
 G/A/ c e | d e c | B/d/ c B | A A G | G/A/ d B | A d G | G/A/ d B | A A G |]  