Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/2
K:G
['', 'Bd BGAG', '[ee]3 a fgaf [M:3/2] g2 ed']  
X:1
L:1/8
M:2/2
K:G
 ef || g2 e2 d2 BA | GBAG EGDE | G2 Bd BGAG | ([FA]G)[DA]F D4 | DGAB dcBA | GBAG [G,E]2 [G,E]F | 
 [G,G]2 Bd BGAG | EFGE D4 || DFA^c d2 [Fd]2 | A^c[ce]c defd | [ee]3 a fgaf | 
[M:3/2] g2 ed BGAF G2 [GB]2 |[M:2/2] DFA^c d2 [Fd]2 | A^c[ce]c d2 [df]d | [ee]3 a fgaf | 
[M:3/2] g2 ed BGA(F G2) Af ||  