Design harmonic structures to improve the musical piece.
|: d2 a agf | e2 f g3 | fed def | efd ecA | d2 a agf | e2 f g>ag"^I" | 
 fed g2 f | ecA d3 :: c2 d ecA | c2 d e2 f/g/ | afd afd | afd afd | 
 c2 d ecA | c2 d e2 f/g/ | afd g2 f | ecA d3 :|  
X:1
L:1/8
M:6/8
K:D
|:"D" d2 a agf |"A7" e2 f g3 |"D" fed def |"G" efd"A7" ecA |"D" d2 a agf |"A7" e2 f g>ag"^I" | 
"D" fed"Em" g2 f |"A7" ecA"D" d3 ::"A7" c2 d ecA | c2 d e2 f/g/ |"D" afd afd | afd afd | 
"A7" c2 d ecA | c2 d e2 f/g/ |"D" afd"Em" g2 f |"A7" ecA"D" d3 :|  