Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:3/4
K:G
['G3 B d2']  
X:1
L:1/8
M:3/4
K:G
 GABcde | =f>f e2 (3edc | (3e=fg f2 (3fed | ee c2 (3cBA G3 B d2 | (3DFA G2 d2 | G2 GBd | 
 (3DFA F2 G2 cdcBAG | cdcBAG | GBd^ced | edcBAG | dc c2 (3cBA | (3Bcd G2 (3GFE | D3 FAF | G3 B d2 | 
 A3 ecA | (3Bcd G2 (3GFE | D2 DFAc/B/ | G2 G4 |]  