Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/16
Q:3/8=120
M:3/8
K:C
['G4 AG F4', 'CE D2 DC B,D |1 G4 DE']  
X:1
L:1/16
Q:3/8=120
M:3/8
K:C
|: G4 AG | F4 E2 | G4 AG | F4 E2 | G4 AG | F4 G2 | F2E2D2 |1 C6 :|2 C4 DE |: F2 FE DF | E2 ED CE | 
 D2 DC B,D |1 G4 DE :|2 C4 DE |: F2 FE DF | E2 ED CE | D2 DC B,D |1 G4 DE :|2 C6 ||  