Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:6/8
K:C
['AGE CEG cBc', 'c2 G']  
X:1
L:1/8
M:6/8
K:C
 e/f/ | g^fg edB | cBc AGE | CEG cBc | edc def | gag edc | cdc AGE | CEG cBc | dcB c2 :: G | 
 c2 G c2 G | cBc e2 e | dcB GAB | dBd g2 g | c2 G c2 G | cBc e2 e | dcB GAB | c3 c2 :|  