Develop an appropriate set of chord transitions to enhance the existing music piece.
FG | AFDE FEDF | (3ABA GB AF D2 | fedf edce | dBAB =cABG | AFDE FEDF | 
 (3ABA GB AF D2 | fedB (3ABA GE | F2 D2 D2 :: fg | afdf g2 fe | dfed BAFG | 
 (3ABA FA BAFA | A2 FA BAfg | afdf g2 fe | dfed BAFG | A3 F GBAG | F2 D2 D2 :|  
X:1
L:1/8
M:2/2
K:D
 FG |"D" AFDE FEDF | (3ABA"G" GB"D" AF D2 | fedf"A" edce |"G" dBAB"C" =cA"G"BG |"D" AFDE FEDF | 
 (3ABA"G" GB"D" AF D2 | fedB"A" (3ABA GE |"D" F2 D2 D2 :: fg |"D" afdf"G" g2 fe |"D" dfed BAFG | 
 (3ABA FA BAFA | A2 FA BAfg | afdf"G" g2 fe |"D" dfed BAFG | A3 F"A" GBAG |"D" F2 D2 D2 :|  