Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:Emin
['GA B3 D BdBA G2 FE E2', 'E2 Bc d3 e d2 cB g2', 'E2 GA B3 d (3dcB (3cBA G2', 'E2 Bc d3 e ecdB (3gbg (3gfe', 'E2 Bc d3 e edcB gfge{e} d2']  
X:1
L:1/8
M:4/4
K:Emin
 GA | B3 D BdBA | G2 FE E2 D>E | G3 A BcdB | e2 A>B A2 GA | B2 (B/c/d) cBAG | A2 B2 g3 f | 
 e3 d BdAB | E2 (E>G) E2 :: Bc | d3 e d2 cB | g2 d2 d2 (gf) | e3 f gfga | b2 e2 e2 (dc) | 
 B2 g2 dBAG | A2 B2 g3 f | e2 d2 (Bd)AB | e2 (E>G) E2 :: GA | B3 d (3dcB (3cBA | G2 FE E2 D>E | 
 G3 A (3BAG (3dcB | (3gfe (3dcB A2 GA | B2 (B/c/d) c/d/c/B/ (A/B/A/G/) | A2 B2{ef} g3 f | 
 TE3 d (3edc (3dcB | e2 E>G E2 :: Bc | d3 e ecdB | (3gbg (3gfe d2 gf | e3 f gGaA | bg (3agf e2 dc | 
 B2 g2 e/d/c/B/ c/B/A/G/ | A2 B2 g3 f | (3egf (3gfe (3dcB (3cBA | e2 E>G E2 :: Bc | d3 e edcB | 
 gfge{e} d2 gf | e3 f gfga | bagf e2 dc | BGBg dBAG | A2 B2 g3 f | e3 d Bd (3ABA | e2 E>G E2 :|  