Construct a harmonic backdrop to enhance the provided melody.
B | AFD DFA | ded cBA | BGE EFA | B2 A Bcd | AFD DFA | ded cBA | Bcd ecA | 
 d3- d2 :: g | f2 d ded | faa afd | cAA eAA | cBc efg | f2 d ded | faa afd | 
 Bcd ecA | d3- d2 :|  
X:1
L:1/8
M:6/8
K:D
 B |"D" AFD DFA | ded cBA |"Em" BGE EFA |"A7" B2 A Bcd |"D" AFD DFA | ded cBA |"G" Bcd"A7" ecA | 
"D" d3- d2 :: g |"D" f2 d ded | faa afd |"A7" cAA eAA | cBc efg |"D" f2 d ded | faa afd | 
"G" Bcd"A7" ecA |"D" d3- d2 :|  