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
['G2 A', 'dBA G2 A']  
X:1
L:1/8
M:6/8
K:G
|:"G" D2 B BAG | BdB"D" A2 B |"G" GED"C" G2 A |"G" BAB"C" GFE |"G" D2 B BAG | BdB"D" A2 B | 
"G" GED"C" G2 A |"D" BGF"G" G3 :| |"Em" efe edB | efe edB |"D" ded dBA | ded dBA |"G" G2 A B2 d | 
"C" efe"D" dBA |"G" GED G2 A |"D" BGF G2 d |"Em" efe edB |"C" efe"G" edB |"D" ded def | 
"C" gfe"D" dBA |"G" G2 A B2 d |"C" ede"D" dBA |"G" GED"C" G2 A |"D" BGF"G" G3 ||  