Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
|: d=c | BE E2 GBAF | DFA=c BGAF | GFEF GABc |1,3 dcdf ef :|2,4 dcdf e2 :: 
 ef | gfef gbag | fddc dfaf |1,3 gfef gbaf | gefd Be :|2,4 bgaf gfed | 
 Bcdf e2 :|  
X:1
L:1/8
M:2/2
K:Edor
|: d=c |"Em" BE E2 GBAF |"D" DFA=c BGAF |"Em" GFEF GABc |1,3"D" dcdf ef :|2,4"D" dcdf"Em" e2 :: 
 ef |"Em" gfef gbag |"D" fddc dfaf |1,3"Em" gfef gbaf |"D" gefd"Em" Be :|2,4"Em" bgaf gfed | 
"D" Bcdf"Em" e2 :|  