Construct a musical piece that follows the designated lettered structure and integrates the provided motif throughout.
X:1
L:1/4
M:6/4
K:Ddor
['e3/2 d/ e', 'e c A']  
X:1
L:1/4
M:6/4
K:Ddor
 A | d3/2 e/ d e3/2 d/ e | f3/2 e/ f e f g | a3/2 g/ f e3/2 d/ e | d3- d2 A :: d | e c A e c A | 
 e c A e c A | a f d a f d | a f d a f d | e c A e c A | e c A e2 f/g/ | a3/2 g/ f e3/2 d/ e | 
 d3 d2 :|  