Craft a fitting chord progression to merge seamlessly with the given musical theme.
AB | d2 df A2 dc | BdBG A2 de | faAa gfed | f2- f2 e2 AB | d2 df A2 dc | 
 BdBG A2 de | fagf gAce | d>edc defg |] a>gfa d2 fd | BdBG A2 de | 
 faAa gfed | f2- f2 e2 fg | a>gfa d2 fd | BdBG A2 de | fagf gAce | 
 d>edc d2 |]  
X:1
L:1/8
M:4/4
K:D
 AB |"D" d2 df A2 dc |"G" BdBG"D" A2 de |"D" faAa"G" gfed |"A" f2- f2 e2 AB |"D" d2 df A2 dc | 
"G" BdBG"D" A2 de |"D" fagf"A" gAce |"D" d>edc defg |]"D" a>gfa d2 fd |"G" BdBG"D" A2 de | 
"D" faAa"G" gfed |"A" f2- f2 e2 fg |"D" a>gfa d2 fd |"G" BdBG"D" A2 de |"D" fagf"A" gAce | 
"D" d>edc d2 |]  