Design harmonic structures to improve the musical piece.
(uA,"^4^4^4^4"A) GFED | 
 FAAB A2(3(uefg) | fd"^4"ec dcBA | BdAF D2 :: (3(uefg) | vafdA bafd | ABAF GFED | 
 A,"^4^4^4^4^0" ABAF E2(3(uefg) | afdA bafd | ABAF GFED | .D(dcd) F"^4"AEA | 
 DdAF D2 :|  
X:1
L:1/16
M:2/4
K:D
 (uA,"^4"D) | vF2(F"^4"A) GFED | EAAB A2(F"^4"A) | AFdF GFED | CDEF E2(DE) | F2(F"^4"A) GFED | 
 FAAB A2(3(uefg) | fd"^4"ec dcBA | BdAF D2 :: (3(uefg) | vafdA bafd | ABAF GFED | 
 A,"^4"DB,"^4"D A,"^4"DF"^4"A |"^0" ABAF E2(3(uefg) | afdA bafd | ABAF GFED | .D(dcd) F"^4"AEA | 
 DdAF D2 :|  