Design harmonic structures to improve the musical piece.
|:"^A" A | c e a2 |"^/" a/g/f/e/ a2 | c e a g/a/ | b B B d | c e a2 | 
"^/" a/g/f/e/ a3/2 e/ | c e B d | c A A ::"^B" d | c e e d/c/ | d f f e/d/ | 
 c e e d/c/ | f B B d | c e e d/c/ | d f f e/d/ | c a B d | 
 c A A :|  
X:1
L:1/4
Q:1/2=112
M:2/2
K:A
|:"^A" A |"A" c e a2 |"^/" a/g/f/e/ a2 |"A" c e"F#m" a g/a/ |"Bm" b B"E7" B d |"A" c e a2 | 
"^/" a/g/f/e/ a3/2 e/ |"A" c e"E7" B d |"A" c A A ::"^B" d |"A" c e e d/c/ |"D" d f f e/d/ | 
"A" c e"F#m" e d/c/ |"Bm" f B"E7" B d |"A" c e e d/c/ |"D" d f f e/d/ |"A" c a"E7" B d | 
"A" c A A :|  