Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/4
M:4/4
K:D
['F F']  
X:1
L:1/4
M:4/4
K:D
 D/E/ | F F F E/D/ | F (F/E/) D A | F F F3/2 E/ | (F A) z | A | B B A (A/G/) | F (F/E/) D A | 
 F3/2 F/ F3/2 E/ | E D z ||  