Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:2/4
K:A
['gfed cBAd', 'A3 E AcBd cedf ecGA BGEE AcBd']  
X:1
L:1/8
M:2/4
K:A
 a | gfed | cBAd | cABG | A2 Ea | gfed | cBAd | cABG | A3 :: E | AcBd | cedf | ecGA | BGEE | AcBd | 
 cfed | cBAG | A3 :|  