Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
Q:1/8=270
M:2/4
K:G
['', 'GB B/c/B/A/ GB', 'a>g fd de fg ad/a/ g>f gf', 'c/B/A B2 cB/c/ dc AG fd cA']  
X:1
L:1/8
Q:1/8=270
M:2/4
K:G
 B>A |: GB B/c/B/A/ | GB c/B/A/B/ | FA AB/A/ | FA D2 | GB B/c/B/A/ | GB dg | fd cA |1 
 G2 B/c/B/A/ :|2 G2 Gd/f/ || g2 a/g/f | ga a>g | fd de | fg ad/a/ | g>f gf | gb d/b/a/g/ | fd cA |1 
 G2- Gd/f/ :|2 G2 gd || B2 cB/c/ | d/e/d/c/ AG | F/G/F/E/ FG | AB c/B/A | B2 cB/c/ | dc AG | 
 fd cA |1 G2 Gd :|2 G2 BB/A/ ||  