Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=140
M:4/4
K:G
['B2 Bc dedc']  
X:1
L:1/8
Q:1/4=140
M:4/4
K:G
 dc |"G" B2 Bc dedc | B2 Bc dedc | B2 G2 G2 cB |"D" A2 D2 D2 dc |"G" B2 Bc dedc | B2 Bc dedc | 
 BdGB"D" cAFA |"G" G2 G2 G2 :: d2 |"G" gfga gdBd | gfga gdBd | gfga"Em" b2 bg |"D" fefg afdf | 
"Em" e2 ef"C" gece |"G" d2 de dBGB |"Am" A2 AB"D7" cAFA |"G" G2 B2 G2 :|  