Construct a harmonious chain of chord progressions that enhance the presented musical piece.
|: BBBA GGGE | DDDB, D2G2 | FFFG A2Ac | BcBA G2D2 | BBBA GGGE | DDDG B2Bd | 
 DDDF A2BA | G2G2G2 z2 ::"^B" EGBe Begb | cec'b a2a2 | bc'ba f^dfa | 
 baBg f2e2 | EGBe Begb | cec'b a2a2 | b2ba f^dgf | e2e2e2 z2 :: 
"^C" bagf edcB | dcec A2A2 | agfe d2dg | bagf e2d2 | bagf edcB | dcec A2cg | 
 f2fe AcBA | G2B2G2 z2 :|  
X:1
L:1/16
Q:1/4=80
M:2/4
K:G
|:"G" BBBA"C" GGGE |"G" DDDB, D2G2 |"D7" FFFG A2Ac |"G" BcBA G2D2 | BBBA"C" GGGE |"G" DDDG B2Bd | 
"D7" DDDF A2BA |"G" G2G2G2 z2 ::"^B""Em" EGBe Begb |"Am" cec'b a2a2 |"B7" bc'ba f^dfa | 
 baBg"Em" f2e2 |"Em" EGBe Begb |"Am" cec'b a2a2 |"B7" b2ba f^dgf |"Em" e2e2e2 z2 :: 
"^C""G" bagf edcB |"Am" dcec A2A2 |"D7" agfe d2dg |"G" bagf e2d2 |"G" bagf edcB |"Am" dcec A2cg | 
"D7" f2fe AcBA |"G" G2B2G2 z2 :|  