Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
Q:1/4=175
M:4/4
K:G
['', 'BG BddB', 'bgfe d4 gg b2 agfd cdfa |1']  
X:1
L:1/8
Q:1/4=175
M:4/4
K:G
 z3 G"G" BddB |: d2 BG BddB | AGGA BddB |"D" A2 GA BAGA |"G" G2 BG B d2 B | d2 BG BddB | 
 G2 BG BddB |"D" A2 GA BAGA |1"G" G4 BddB :|2"G" G4 gg b2 |: !turn!g3 g agfe | d4 gg b2 | 
 g3 g aged | g4 gg b2 | g3 g bgfe | d4 gg b2 | agfd cdfa |1 g3 z gg b2 :|  