Construct chordal sequences to boost the harmonious coherence within the specified musical piece.
|: e3 d cAAc |"^(E7)" efed cABc | d2 fd c2 ec | B2 BB B3 d || efed cAAc | 
"^(E7)" efed cABc | d2 fd c2 ec | B2 AB cA A2 :: e3 f =g3 f | 
"^(E7)" efed cA A2 | e3 f =g2 Bc | ded=c B=G G2 || e3 f =g3 f | 
"^(E7)" efed cABc | d2 fd c2 ec | B2 AB cA A2 :|  
X:1
L:1/8
M:4/4
K:A
|:"A" e3 d cAAc |"^(E7)" efed"A" cABc |"D" d2 fd"A" c2 ec |"Bm" B2 BB"E7" B3 d ||"A" efed cAAc | 
"^(E7)" efed"A" cABc |"D" d2 fd"A" c2 ec |"E7" B2 AB"A" cA A2 ::"A" e3 f"G" =g3 f | 
"^(E7)" efed"A" cA A2 |"A" e3 f"G" =g2 Bc | ded=c B=G G2 ||"A" e3 f"G" =g3 f | 
"^(E7)" efed"A" cABc |"D" d2 fd"A" c2 ec |"E7" B2 AB"A" cA A2 :|  