Construct a musical piece using the designated motif and sticking to the alphabetical form presented.
X:1
L:1/8
M:4/4
K:G
['', '(3cBA GBDG B2 GB dGBd gbag', 'G B3 G2']  
X:1
L:1/8
M:4/4
K:G
 (3cBA |: GBDG B2 GB | dGBd gbag | fed^c =cAFD | GBAG (3FED (3cBA | GBDG B2 GB | dGBd gbag | 
 fedB cAFD |1 G B3 G2 BA :|2 G B3 G2 b/b/b |: bBeg bagf | e^def gfg^g | aAdf agfe | 
 ed (3^cde d2 ab | c'afd (3c^cd ef | gfga (3bag ag | fed^c =cAFA |1 G B3 G2 b/b/b :|2 G B3 G2 BA ||  