Create a series of chord progressions to improve the harmonic structure of the given music piece.
DF | AF A2 dc | BG B2 ef | ge c2 Bc | BA F2 DF | AF A2 dc | BG B2 ef | 
 ge cA fe |1 d4 DF :|2 d4 fg |]: af d2 Ad | cB B2 ef | ge c2 Bc | 
 BA F2 fg | af d2 Ad | cB B2 ef | ge cA fe |1 d4 fg :|2 d4 DF |]  
X:1
L:1/8
M:3/4
K:D
 DF |"D" AF A2 dc |"G" BG B2 ef |"A" ge c2 Bc |"D" BA F2 DF | AF A2 dc |"G" BG B2 ef | 
"A" ge cA fe |1"D" d4 DF :|2"D" d4"G" fg |]:"D" af d2 Ad |"G" cB B2 ef |"A" ge c2 Bc | 
"D" BA F2 fg | af d2 Ad |"G" cB B2 ef |"A" ge cA fe |1"D" d4"G" fg :|2"D" d4 DF |]  