Design various chord structures to improve the overall harmony of the assigned musical composition.
D/ | G3/2 A/ B | A B d | e3 | d2 B/A/ | G3/2 A/ B | A2 G | E3 | D2 E/F/ | 
 G3/2 A/ B | A B d | e3 | d2 g | G3/2 A/ B | A G F | G3- | G2 :: B/c/ | 
 d B d | g f g | e3 | A2 A/B/ |"^(C)" c3/2 d/ e | d B A | G3 | F2 D | 
 G3/2 A/ B | A B d | e3 | d2 g | G3/2 A/ B | A G F | G3- | G2 :|  
X:1
L:1/4
M:3/4
K:G
 D/ |"G" G3/2 A/ B |"D7" A B d |"C" e3 |"G" d2 B/A/ |"G" G3/2 A/ B | A2 G |"C" E3 |"D7" D2 E/F/ | 
"G" G3/2 A/ B |"D7" A B d |"C" e3 |"G" d2 g |"G" G3/2 A/ B |"D7" A G F |"G" G3- | G2 :: B/c/ | 
"G" d B d | g f g |"C" e3 |"Am" A2 A/B/ |"^(C)" c3/2 d/ e |"G" d B A |"C" G3 |"D7" F2 D | 
"G" G3/2 A/ B |"D7" A B d |"C" e3 |"G" d2 g |"G" G3/2 A/ B |"D7" A G F |"G" G3- | G2 :|  