Develop harmonious chord sequences that enhance the given musical composition.
|: DFCE D2EF | GECE D2 A,B,/C/ | DFCE D2EF | GECE D2 A,B,/C/ | 
 D2F2 A,2F2 | E4 E4 | E^DEF GFE=D | C2 A2 B,2 C2 | 
 D4 D4 :: a^gab a=gf2 | fefg fed2 | dcde f2 df | e4 e4 | 
 e^def gfe=d | c2 a2 B2 c2 | d4 d4 :|  
X:1
L:1/16
M:2/4
K:D
|:"D" DFCE"D" D2EF |"A" GECE"D" D2 A,B,/C/ |"D" DFCE"D" D2EF |"A" GECE"D" D2 A,B,/C/ | 
"D" D2F2"D" A,2F2 |"A" E4"A/E" E4 |"A" E^DEF"A/E" GFE=D |"A" C2 A2"A/B" B,2"A/C#" C2 | 
"D" D4"D/A" D4 ::"D" a^gab"D/A" a=gf2 |"D" fefg"D/A" fed2 |"D" dcde"D/A" f2 df |"A" e4"A/E" e4 | 
"A" e^def"A/E" gfe=d |"A" c2 a2"A/C#" B2 c2 |"D" d4"D/A" d4 :|  