Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/16
Q:1/4=120
M:2/4
K:Emin
['B2^d2 e6', '', 'd2(ef) g2(fg) (ef)(ga)']  
X:1
L:1/16
Q:1/4=120
M:2/4
K:Emin
"^Brilliant""^A" | (BA) | (GABc) d2(cd) | (edcd) B2(ba) |1{a} g2(fe) B2^d2 | e6 :|2 (gfed) B2^d2 | 
"^fine" e6 |]"^B" |] b2 | b2>a2 g2(fg) | (agfe) d2(ef) | g2(fg) (ef)(ga) | b2B2"^->A2" B2 |]  