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
['G,B,D E2 D DB,D', 'GAB efe d2 B BAG ABd efe']  
X:1
L:1/8
M:6/8
K:G
 G,B,D E2 D | DB,D G3 | G,B,D C2 B | AGF G3 | G,B,D E2 D | DB,D GAB | d3 B3 |1 AGF G3 :|2 
 AGF GBd |: efe d3 | BAG GAB | efe d2 B | BAG ABd | efe d3 | BAG GAB | c3 B3 | AGF G3 :|  