Design harmonic structures to improve the musical piece.
D2(DE F2)(FG) | (AB)(AG) A4 | (cd)(ef) (dc)A2 | (cd)(ef) (dc)A2 | D2DE F2FG | (AB)AG A4 | 
 cdef dcAc | d4 D4 :|{/e} =f2(fa){/a} g2ge |{/e} =f2(ag) e4 | (cd)(ef) dcA2 | 
 (cd)(ef) dcA2 |{/e} =f2(fa){/a} g2ge | (e=f)(ag) e4 | (cd)(ef) (ec)(Ac) | 
 d4 D4 |]  
X:1
L:1/16
M:2/4
K:D
"D" D2(DE F2)(FG) | (AB)(AG) A4 |"A" (cd)(ef) (dc)A2 | (cd)(ef) (dc)A2 |"D" D2DE F2FG | (AB)AG A4 | 
"A" cdef dcAc |"D" d4 D4 :|"Dm"{/e} =f2(fa)"A"{/a} g2ge |"Dm"{/e} =f2(ag)"A" e4 | (cd)(ef) dcA2 | 
 (cd)(ef) dcA2 |"Dm"{/e} =f2(fa)"A"{/a} g2ge |"Dm" (e=f)(ag)"A" e4 | (cd)(ef) (ec)(Ac) | 
"D" d4 D4 |]  