Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
B A/4B/4 A/ | G F | E E/4D/4 E/ | G A | B A/4B/4 A/ | G F | 
 E E/4D/4 G/ | A E ::[I:MIDI= program 66]"^prog: 67" G G | G G | F F | F F | 
 G/ F D/ | F G | E2 | E2 | G/ F D/ | F G | E2 | E2 :|  
X:1
L:1/4
Q:1/4=160
M:2/4
K:Emin
"Em" B"Am" A/4B/4 A/ |"Em" G"D" F |"Em" E E/4D/4 E/ | G"Am" A |"Em" B"Am" A/4B/4 A/ |"Em" G"D" F | 
"Em" E E/4D/4 G/ |"Am" A"Em" E ::[I:MIDI= program 66]"^prog: 67""Em" G G | G G |"D" F F | F F | 
 G/ F D/ | F"Em" G | E2 | E2 |"D" G/ F D/ | F"Em" G | E2 | E2 :|  