Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:3/4
K:F
['AA c2 c2 GB']  
X:1
L:1/8
M:3/4
K:F
 Ac f2 f2 | df e2 d2 | Ac f2 f2 | dB G2 F2 | AA c2 c2 | GB d3 c | AA c2 c2 | GB G2 F2 |]  