Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=360
M:4/4
K:A
['fB (3BAB fecA de (3fga edca', '(3aba ga']  
X:1
L:1/8
Q:1/8=360
M:4/4
K:A
 d/e/d/c/ df edcA | fB (3BAB fecA | de (3fga edca | eAAa eAAe | d2 fa eAce | fB (3BAB fecA | 
 de (3fga edca | eAAa eAAe || (3aba ga fbea | fB (3BAB fece | (3aba ga fbaf |1 eAAa eAce :|2 
 e^dea (3fga ec ||  