Develop chord structures to complement and enrich the harmony of the allotted musical excerpt.
|: d2 fd g2 fe | d2 fd e2 cA | d2 fd g2 fe | (3fga gf e2 cA :: 
 g2 dB B2 dB | g2 dB e2 cA | g2 dB B2 dB | A2 af e2 cA :|  
X:1
L:1/8
M:4/4
K:D
|:"D" d2 fd"G" g2 fe |"D" d2 fd"A7" e2 cA |"D" d2 fd"G" g2 fe |"D" (3fga gf"A7" e2 cA :: 
"G" g2 dB B2 dB | g2 dB"A7" e2 cA |"G" g2 dB B2 dB |"A7" A2 af e2 cA :|  