Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:C
['G Gcc cBA', 'c2 e/f/ gec cBc AFF F2 f/g/']  
X:1
L:1/8
M:6/8
K:C
 G | Gcc cBA | G>AG GEF | Gcc Tc2 d | ecA A2 G | Gcc cBA | GAG GEF | Gcc def | ecc c2 :| e/f/ | 
 gec cBc | AFF F2 f/g/ | afd dec | BGG G2 G | Gcc cBA | GAG GEF | Gcc def | ecc c2 ||  