Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
Q:1/2=60
M:2/4
K:D
['F/E/D AF GA B2']  
X:1
L:1/8
Q:1/2=60
M:2/4
K:D
 A | F/E/D AF | GA B2 | Acde | fGFE | F/E/D AF | GA B2 | A/c/d AG | FED |:  