Design various chord structures to improve the overall harmony of the assigned musical composition.
d |: f3 fed | ABA AFA | f3 fed | e3 e2 f | g2 g bag | f3 agf | e2 e f2 e |1 
 d3 d2 e :|2 d3 d2 g |: fBB fBB | gcc gcc | add add | b3 bag | fBB fBB | 
 gcc gcc | f3 edc | d3 d3 :|  
X:1
L:1/8
M:6/8
K:D
 d |:"D" f3 fed | ABA AFA | f3 fed |"Em" e3 e2 f |"G" g2 g bag |"D" f3 agf |"A" e2 e f2 e |1 
"D" d3 d2 e :|2 d3 d2 g |:"Bm" fBB fBB |"C" gcc gcc |"D" add add |"Em" b3 bag |"Bm" fBB fBB | 
"C" gcc gcc |"D" f3"A" edc |"D" d3 d3 :|  