Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:6/8
K:Gmin
['(B/A/) G>FD']  
X:1
L:1/8
M:6/8
K:Gmin
 (B/A/) | G>FD C>D^F | G3 z2 (B/c/) | B>cd cAG | F3 z2 (B/c/) | d>ed c2 (d/c/) | B>AG A2 (B/A/) | 
 G>FD CD^F | G2 G B2 (B/c/) ded cBA | G3- G2 |:  