Design various chord structures to improve the overall harmony of the assigned musical composition.
|: GA Bc dB | GB AA G2 | ef gd cB | AG AB A2 | GA Bc d2 | ef ga gd | 
 ed/c/ B2 A2 | G6 :: g2 ga bg | f2 fg af | e2 ef ge |"^(G)" e2 d4 | 
 cB cd ec | BG Bd gd | ed/c/ B2 A2 | G6 :|  
X:1
L:1/8
M:3/4
K:G
|:"G" GA Bc dB | GB"D" AA"G" G2 |"C" ef"G" gd cB |"A" AG AB"D" A2 |"G" GA Bc d2 |"C" ef ga"G" gd | 
"C" ed/c/"G" B2"D" A2 |"G" G6 ::"G" g2 ga bg |"D" f2 fg af |"C" e2 ef ge |"^(G)" e2"G" d4 | 
"Am" cB cd ec |"G" BG Bd gd |"C" ed/c/"G" B2"D" A2 |"G" G6 :|  