Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/4
K:G
['Bc/B/ AG', 'gd ed Bd']  
X:1
L:1/8
M:2/4
K:G
|: Bc/B/ AG | EG GA | Bc/B/ AG | Bd ed | Bc/B/ AG | EG GA | BG/B/ dB | AG G2 :: gd ed | Bd d2 | 
 gd ed | Bd A2 | gd ed | Bd ed | Bc/B/ AG/A/ | BG G2 :|  