Craft a fitting chord progression to merge seamlessly with the given musical theme.
ABdf efdB | AFFF EDEF | ABdf e2 df | afef d2 dB | ABdf efdB | 
 AFFF EDEF | ABdf e2 df |1 afef d2 dc :|2 afef d2 fg |: a2 fa bafa | 
 a2 fd edBd | a2 fa bafb | afef defg | a2 fa bafa | a2 fd edBd | 
 AFFF ABdf | afef d3 z :|  
X:1
L:1/8
M:2/2
K:D
"D" ABdf"G" efdB |"D" AFFF"A" EDEF |"D" ABdf"G" e2 df |"A" afef"D" d2 dB | ABdf"G" efdB | 
"D" AFFF"A" EDEF |"D" ABdf"G" e2 df |1"A" afef"D" d2 dc :|2"A" afef"D" d2 fg |:"D" a2 fa bafa | 
 a2 fd"G" edBd |"D" a2 fa bafb |"A" afef"D" defg |"D" a2 fa bafa | a2 fd"G" edBd | 
"D" AFFF"G" ABdf |"A" afef"D" d3 z :|  