Design harmonic structures to improve the musical piece.
cd | e2 ef edcB | AB (3cBA d4 | c2 cA (3BcB Ac | BAGF E2 cd | e2 ef edcB | 
 AB (3cBA d4 | cBAc BA G2 | A6 :: G2 | F4 B4 | F2 AB- BA F2 | A2 cA BcAB | 
 cABc- cB A2 | F4 B4 | F2 AB- Bfed | cdec BA G2 | A6 :|  
X:1
L:1/8
M:2/2
K:A
 cd |"A" e2 ef edcB | AB (3cBA"D" d4 |"A" c2 cA (3BcB Ac |"E" BAGF E2 cd |"A" e2 ef edcB | 
 AB (3cBA"D" d4 |"A" cBAc"E" BA G2 |"A" A6 :: G2 |"Bm" F4 B4 | F2 AB- BA F2 |"A" A2 cA BcAB | 
 cABc- cB A2 |"Bm" F4 B4 | F2 AB- Bfed |"A" cdec"E" BA G2 |"A" A6 :|  