Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/4
Q:1/8=240
M:2/2
K:G
['', 'd/c/ B G2 D E2 D G', 'B2 A d']  
X:1
L:1/4
Q:1/8=240
M:2/2
K:G
 d/c/ |: B G2 D | E2 D G | F G c B | A/G/F/E/ D d/c/ | B G2 D | E2 D G | F G B/A/G/F/ | G2 G :: A | 
 B2 A d | B2 A d | B G F G | A/G/F/E/ D A | B2 A d | B2 A d | B A/G/ A G/F/ | G2 G :|  