Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
M:4/4
K:C
['A/B/c cB A2 G2', 'e/f/g gf e2']  
X:1
L:1/8
M:4/4
K:C
 G | A/B/c cB A2 G2 | AGAB c/B/c/d/ cG | A/B/c cB A2 G2 | AGAB c2 :: c | e/f/g gf | e2 d2 | 
 g2 g/a/g/f/ e2 d2 | e/f/g gf e2 d/e/f | ecGB c3 :|  