Craft a fitting chord progression to merge seamlessly with the given musical theme.
A | D>D DE DCCD | F>G AF G2 (3ABc | d>c AG AGED | C>C CD C2 (3AGE | 
 D>D DE DCCD | F>G AF G2 (3ABc | d>c AG AGEC | D4 D2 |] AB | 
 d>c AG F>G AB | c>d cA c2 (3ABc | d>c AG AGED | C>C CD C2 (3AGE | 
 D>D DE DCCD | F>G AF G2 (3ABc | d>c AG AGEC | D4 D4 |]  
X:1
L:1/8
M:4/4
K:Dmix
 A |"D" D>D DE"C" DCCD |"D" F>G AF"G" G2 (3ABc |"D" d>c AG AGED |"C" C>C CD C2 (3AGE | 
"D" D>D DE"C" DCCD |"D" F>G AF"G" G2 (3ABc |"D" d>c AG"C" AGEC |"D" D4 D2 |] AB | 
"D" d>c AG"G" F>G AB |"D" c>d cA"C" c2 (3ABc |"D" d>c AG AGED |"C" C>C CD C2 (3AGE | 
"D" D>D DE"C" DCCD |"D" F>G AF"G" G2 (3ABc |"D" d>c AG"C" AGEC |"D" D4 D4 |]  