Construct a harmonious chain of chord progressions that enhance the presented musical piece.
Bc | dgfe dcBA | GBDG B2 AG | FADF A2 GF | GBDG B2 Bc | dgfe dcBA | 
 GBDG B2 AG | FGAB cdef | g2 G2 G2 :| AG | FADF A2 GF | GBDG B2 AG | 
 FADF A2 GF | GDEF GABc | dgfe dcBA | GBDG B2 AG | FGAB cdef | g2 G2 G2 :|  
X:1
L:1/8
M:4/4
K:G
 Bc |"G" dgfe dcBA |"G" GBDG B2 AG |"D7" FADF A2 GF |"G" GBDG"D7" B2 Bc |"G" dgfe dcBA | 
"G" GBDG B2 AG |"D7" FGAB cdef |"G" g2 G2 G2 :| AG |"D7" FADF A2 GF |"G" GBDG B2 AG | 
"D7" FADF A2 GF |"G" GDEF"D7" GABc |"G" dgfe dcBA |"G" GBDG B2 AG |"D7" FGAB cdef |"G" g2 G2 G2 :|  