Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:Emin
['B,2 E2 B,EGE']  
X:1
L:1/8
M:4/4
K:Emin
|:"Em" B,2 E2 B,EGE |"D" DB,A,G, A,G,A,G, |"Em" B,2 E2 B,EGE |"D" FAdF"Em" FE E2 | 
"Em" B,2 E2 B,EGE |"D" DB,A,G, A,G,A,G, |"G" [B,D]2 [B,D]2"C" [CE]3 =F |"D" ^FAdF"Em" FE E2 :: 
"Em" ebga fge^c |"D" d2 adbdad |"Em" ebga fge^c |"D" dBAF"A" FE E2 |"Em" ebga fge^c | 
"D" d2 ad bdad |"C" EFGA BAGA |"C7" BAGF FE E2 :|  