Develop chord structures to complement and enrich the harmony of the allotted musical excerpt.
|: A,B, | DFED B,2 B,2 | A,2 A,2 D4 | E2 E2 F2 F2 | EFED B,2 A,B, | 
 DFED B,2 B,2 | A,2 A,2 D2 (3ABc | dcdA BdAG | FDEC D2 :: fg | 
 agfa gfeg | fedf edBA | dcdf edeg | fedf e2 fg | agfa gfeg | 
 fedf edBA | dcdA BdAG | FDEC D2 :|  
X:1
L:1/8
M:2/2
K:D
|: A,B, |"D" DFED"G" B,2 B,2 |"A" A,2 A,2"D" D4 |"A" E2 E2"D" F2 F2 |"A" EFED B,2 A,B, | 
"D" DFED"G" B,2 B,2 |"A" A,2 A,2"D" D2 (3ABc |"D" dcdA"G" BdAG |"A" FDEC"D" D2 :: fg | 
"D" agfa"G" gfeg |"D" fedf"A" edBA |"D" dcdf"A" edeg |"D" fedf"A" e2 fg |"D" agfa"G" gfeg | 
"D" fedf"A" edBA |"D" dcdA"G" BdAG |"A" FDEC"D" D2 :|  