Construct a harmonious chain of chord progressions that enhance the presented musical piece.
"^A" a2 fe | dc BA | f2 A2 | G2 FE | Ac ec | B^d fa | ge f^d | e2 E2 | 
 a2 fe | dc BA | f2 A2 | G2 FE | FA dF | EG Bd | cB AG | A2 A,2 || 
"^B" ce ag | f2 ed | ce ag | f2 ed | ce ag | gf fe | ed dc | c2 B2 | 
 dc BA | G/A/B E2 | dc BA | f/g/a g2 | fA af | ec BA | E2 G2 | 
 A4 ||  
X:1
L:1/8
Q:1/8=2
M:2/4
K:A
"^A""A" a2 fe | dc BA |"D" f2 A2 |"E" G2 FE |"A" Ac ec |"B7" B^d fa |"E" ge"B7" f^d |"E" e2 E2 | 
"A" a2 fe | dc BA |"D" f2 A2 |"E" G2 FE |"D" FA dF |"E7" EG Bd |"A" cB"E7" AG |"A" A2 A,2 || 
"^B""A" ce ag |"D" f2 ed |"A" ce ag |"D" f2 ed |"A" ce ag |"D" gf"A" fe |"D" ed dc |"E" c2"E7" B2 | 
"D" dc BA |"E" G/A/B E2 |"D" dc BA |"Bm7" f/g/a"E" g2 |"D" fA af |"A" ec BA |"E" E2"E7" G2 | 
"A" A4 ||  