Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/4
M:4/4
K:Bb
['d d']  
X:1
L:1/4
M:4/4
K:Bb
 B2 A G | F F/>E/ D2 | F d d d | c c B/F/D/F/ | B2 A G | F F/>E/ D2 | F d d d | c c B z/ B/ | 
 B d f d | d c c d | c B B c | B A A z | G2 B G | F/>G/F/>E/ D2 | F d d d | c c B2 |]  