Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:3/4
K:G
['(G2 E) (D2 E)']  
X:1
L:1/4
M:3/4
K:G
 z B A | (G2 E) | (D2 E) | G3 | (G2 B) | (d2 B) | (G2 B) | d3 | d2 e | d2 B | (B{cB} A G) | A3 | 
 (A2 B) | c2 A | B2 G | E3 | (G2 A) | (B2 d) | (d2 e) | d3 | (g2 e) | (d2 B) | (B{cB} A G) | 
 (A2 c) | (B2 A) | (G2 E) | (D2 E) | (G2 A) | (B2 G) | (A2 B) | (.G2 .G) | G3 ||  