Develop an appropriate set of chord transitions to enhance the existing music piece.
|: dfdf dfdf | f2 e4 e2 | e2g2 gbag | ga d6 | gbgb gbgb | b2 a4 gf | 
 e2b2 agfe |1 eg f4 e2 :|2 g2 f4 gf | e2b2 agfe | d8 |: defd A4 | fgfe d4 | 
 ^cdef"^(Gm)" edcB | BA A4 A2 | f2a2 c'2a2 | g2 g4 _a2 | _aggf feed | 
 ef d4 d2 :: a6 gf | ga f4 f2 | abab a2gf | ga f4 f2 | g_aga gfef | g6 _a2 | 
 _aggf feed | ef d6 :|  
X:1
L:1/16
M:2/4
K:Dmin
|:"Dm" dfdf dfdf |"A7" f2 e4 e2 | e2g2 gbag |"Dm" ga d6 |"Gm" gbgb gbgb |"Dm" b2 a4 gf | 
"A7" e2b2 agfe |1"Dm" eg f4 e2 :|2"Dm" g2 f4 gf |"A7" e2b2 agfe |"Dm" d8 |:"Dm" defd A4 | fgfe d4 | 
"A" ^cdef"^(Gm)" edcB |"A" BA A4 A2 |"F" f2a2 c'2a2 |"Gm" g2 g4 _a2 |"A" _aggf feed | 
"Dm" ef d4 d2 ::"F" a6 gf | ga f4 f2 | abab a2gf | ga f4 f2 |"Gm" g_aga gfef | g6 _a2 | 
"A" _aggf feed |"Dm" ef d6 :|  