Design various chord structures to improve the overall harmony of the assigned musical composition.
cffc f2 (3faf | cfad' b2 a2 | b3 b b4 | c'bc'd' c'baf | cffc f2 ff | 
 cfad' b2 a2 | e'3 c' c'4 | c'bc'd' c'baf :: cffc f2 c2 | ecef ec (3ABc | 
 d2 cd (3BcB A2 | cd (3cBA BA F2 | cffc f2 c2 | ecef ec (3ABc | d2 cd (3BcB (3ABA |1 
 FBAF BA F2 :|2 FBAF BAFD ||  
X:1
L:1/8
M:4/4
K:Bdor
"F#m" cffc f2 (3faf | cfad' b2 a2 |"Bm" b3 b b4 |"D" c'bc'd' c'baf |"F#m" cffc f2 ff | 
 cfad' b2 a2 |"C#m" e'3 c' c'4 |"Bm" c'bc'd' c'baf ::"F#m" cffc f2 c2 |"A" ecef ec (3ABc | 
"Bm" d2 cd (3BcB A2 |"D" cd (3cBA BA F2 |"F#m" cffc f2 c2 |"A" ecef ec (3ABc | d2 cd (3BcB (3ABA |1 
"D" FBAF BA F2 :|2"Bm" FBAF BAFD ||  