Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:6/8
K:D
['fed cAF', 'fed efg']  
X:1
L:1/8
M:6/8
K:D
 e | fed cAF | G3 ABc | AdB cAF | GFG Ade | fed cAF | GFG ABc | AdB c/B/AG | Adc d2 :| e | 
 fed efg | eAA eAA | fed efg | age d3 | fed efg | eAA eAA | f/g/af gec | edc d2 :|  