Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:6/8
K:Glyd
['FED (c/B/Ag) fed', 'fAg fed', '(a/g/f)a (g/f/e)g']  
X:1
L:1/8
M:6/8
K:Glyd
 G | FED (c/B/Ag) | fed cAG | (A/B/A)(G A)Bc | dcA ABG | FED (c/B/Ag) | fed cAF | TG3 GA(F | 
 D)GG G2 :| | B | cBA fAg | fed cAG | (A/B/A)(G A)Bc | dcA ABG | FED fAg | fed cAF | TG3 GA(F | 
 D)GG G2 :| | f | (a/g/f)a (g/f/e)g | fed cAG | (A/B/A)(G A)Bc | dcA Afg | (a/g/f)a (g/f/e)g | 
 (f/e/d)(f e)cA | TG3 GA(F | D)GG G2 :|  