Develop an original musical piece that integrates the given alphabet sequence and motif.
X:1
L:1/4
M:4/4
K:D
['', 'A A']  
X:1
L:1/4
M:4/4
K:D
 F/E/ |: D D D/E/F/G/ | A A A f/e/ | d B A F | B E E/G/F/E/ | D D D/E/F/G/ | A A A f | e d c B |1 
 A3/2 B/ A/G/F/E/ :|  