Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
['c G2 G GAG GFE DEF EFG', 'edc cBA']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
 c | G2 G GAG | GFE DEF | EFG GcG | E3 C2 c | A2 A ABc | Bcd ABc | BAG DG^F | G3- G2 :| G | 
 c2 c cde | edc cBA | d2 d def | fed dcB | e2 e efg | gfe edc | cBA ABc | B3 G2 F | Ecc Gcc | 
 Fcc Ecc | Dcc Ccd | c3- c2 :|  