Design various chord structures to improve the overall harmony of the assigned musical composition.
A>G F>E D2 d>e | f2 e>d"^(A7)" f<a a2 | A>G F>E D2 d>e | f>e d>c B3 d | 
 A>G F>E D2 d>e | f2 e>d f<a a2 | b>g"^/F#" a>f e>d e>g | f>e d>c B3 d |] 
 A>B d>e f>e d<A | B2 g>B B<A A>B | A>B d>e f>a f>d | B<B g>f e3 B | 
 A>B d>e f>e d<A | B2 g>B B<A A>B | A>B d>e f>a f>d | B<d c<e d4 |]  
X:1
L:1/8
M:4/4
K:D
"D" A>G F>E D2 d>e | f2 e>d"^(A7)" f<a a2 |"D" A>G F>E"Bm" D2 d>e |"G" f>e d>c"A7" B3 d | 
"D" A>G F>E D2 d>e | f2 e>d f<a a2 |"G" b>g"^/F#" a>f"Em" e>d e>g |"D" f>e d>c"A7" B3 d |] 
"D" A>B d>e"Bm" f>e d<A |"G" B2 g>B"A7" B<A A>B |"D" A>B d>e"Bm" f>a f>d |"Em" B<B g>f"A7" e3 B | 
"D" A>B d>e"Bm" f>e d<A |"G" B2 g>B"A7" B<A A>B |"D" A>B d>e"Bm" f>a f>d |"G" B<d"A7" c<e"D" d4 |]  