Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:G
['(B,/A,/G,) B,D G3 A', 'eg g2']  
X:1
L:1/8
M:4/4
K:G
|: GE | DB, B,2 DB,G,A, | (B,/A,/G,) B,D G3 A | B2 AB GE E2 | GEDB, EA, A,2 | B,DA,B, G,3 A, | 
 (B,/A,/G,) B,D G3 A | Bded BAGA | BdAB G2 :: Bd | eg g2 edBA | GBDE GABd |{B} c3 A B2 AG | 
 EAAG A2 (B/c/d) | eg g2 agba | gedB A2 GA | BE E2 DEGA | BdAB G2 :|  