Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
['(g/f/)(e/d/) gd', 'B/c/d/B/ GB']  
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
 c | Bdd(e/f/) | (g/f/)(e/d/) gd | gd gd | eAAc | Bd d(e/f/) | (g/f/)(e/d/) gd | ce d/e/d/c/ | 
 BGG :: c | B/c/d/B/ GB | ceAc | B/c/d/B/ GB | ADDc | B/c/d/B/ GB | ceAf | gdec |"^NB" BGG :|  