Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/4
M:4/4
K:D
['', 'g f', 'g f']  
X:1
L:1/4
M:4/4
K:D
 A/G/ |: F A B c | d/c/d/e/ f a | g f e d | c B A G | F A B c | d/c/d/e/ f a | g f e/A/ B/c/ |1 
 d2 d A/G/ :|2 B/c/ d d c/d/ |: e A e A | g f e A | g f e d | c B A G | F A B c | d/c/d/e/ f a | 
 g f e/A/ B/c/ |1 d2 d c/d/ :|  