Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:2/4
K:G
['G2 G>A BddB', 'de/f/ gd']  
X:1
L:1/8
M:2/4
K:G
|: G2 G>A | BddB | cBAG | AcBA | G2 G>A | BddB | cBAB |1 G2 Bd :|2 G2 de/f/ |: g2 f>f | eg d2 | 
 de/f/ gd | ed A2 | de/f/ gd | egdB | cBAB |1 G2 de/f/ :|2 G4 ||  