Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:6/8
K:G
['age dBd']  
X:1
L:1/8
M:6/8
K:G
 g/f/ |"Am" eAA fAA |"^(C)" gfg age |"G" dBA G3 | BGB dBd |"Am" eAA fAA |"^(C)" gfg age | 
"G" dBd gdB |"Am" ABA A2 :: e |"Am" efg aba | aba age |"G" dBd g3 | gba ged |"Am" efg aba | 
 aba age |"G" dBd gdB |"Am" ABA A2 :|  