Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
Q:1/2=80
M:4/4
K:D
['dfaf bgaf', 'dfBf dfBf']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:D
 dfaf bgaf | dfgf ecAc | dfaf bgaf | bgaf ecAc :: dfBf dfBf | dfBf ecAc | dfBf dfBf | bgaf ecAc :|  