Develop harmonious chord sequences that enhance the given musical composition.
af de | fd BA | F2 A2 | DE FB | AF AB | cd Bc | Ac eb | af de | 
 fd BA | F2 A2 | DE FD | GF GF | EF ED | CA, B,C | D4 :: AB dB | AB dB | 
 AB de | f2 ef | gf ef | gf ef | ga ^gb | a4 | AB dB | AB dB | AB de | f2 ef | 
 gf ef | ed cB | AB c2 | d4 :|  
X:1
L:1/8
M:2/2
K:D
"D" af de |"Bm" fd BA |"D" F2 A2 |"Bm" DE FB |"D" AF AB |"A7" cd Bc | Ac eb |"D" af de | 
"Bm" fd BA |"D" F2 A2 | DE FD |"G" GF GF |"A" EF ED |"F#m" CA, B,C |"D" D4 ::"D" AB dB | AB dB | 
 AB de | f2 ef |"Em" gf ef | gf ef |"G" ga ^gb |"A7" a4 |"D" AB dB | AB dB | AB de | f2 ef | 
"Em" gf ef |"A" ed cB |"F#m" AB c2 |"D" d4 :|  