Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:G
['dcBd g2 gB cB a3 g']  
X:1
L:1/8
M:4/4
K:G
 B,A, |"G" G,B,DG BAGB | dBGA BAGB |"C" cdcB AGFG |"D" AGFE DCB,A, |"G" G,B,DG BAGB | 
"G" dBGA BAGB |"C" cdcB AGFE |"D" DFAF"G" G2 :: Bc |"G" dcBd g2 gB |"C" cB A2"A7" a3 g | 
"D" f2 fg fedf |"A" ed^ce"D" d2 B=c |"G" dcBd g2 gB |"C" cB A2"A7" a3 g |"D" fedB cAFD | 
"G" G2 B2 G2 :|  