Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
Q:1/4=120
M:4/4
K:F
['ed c2']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:F
 e3 f ed c2 | B2 d2 c3 z | GB c2 BG F2 | D2 EF G2 G2 | z2 cd cd e2 | c2 f2 ed c2 | z2 fe c2 fe | 
 f g3 g4 |]  