Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/4
M:4/4
K:G
['B/A/ G']  
X:1
L:1/4
M:4/4
K:G
 B B/A/ G G | A A B/A/ G | d d/c/ B B | A/G/A/B/ G2 | B B/c/ d d | e e d/c/ B | B B/c/ d d | 
 e e d2 | B B/A/ G G | A A B/A/ G | d d/c/ B B | A/G/A/B/ G2 |]  