Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
Q:1/8=100
M:6/8
K:G
['D G2 B BAB c2 A ABc', 'c2 B']  
X:1
L:1/8
Q:1/8=100
M:6/8
K:G
"A" D | G2 B BAB | c2 A ABc | dBd cAc | B2 G G2 :|"B" B/c/ | d2 d d2 B | c2 B B2 A | e2 d dAB | 
 c2 B A2 D | G2 B BAB | c2 A ABc | dBd cAc | B2 G G2 :|  