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:G
['D2 G G2 A', 'def g2 a bag afd', 'G2 G/A/ B3 c3 dcB cAG F3']  
X:1
L:1/8
M:6/8
K:G
 G/F/ | D2 G G2 A | B2 d cAG | F2 D DED | F2 F E2 D | D2 G G2 A | BAG Ade | fed cAF | AGG G2 :: 
 B/c/ | def g2 a | bag afd | fef afd | d>ef/g/ afd | def g2 a | bag afd | fed cAF | AGG G2 :: 
 G/A/ | B3 c3 | dcB cAG | F3 DED | FEF AFD | B3 cBc | dcB cde | fed cAF | AGG G2 :|  