Assemble a piece of music following the alphabetical representation and incorporating the provided motif.
X:1
L:1/8
Q:1/4=140
M:2/4
K:Bb
['(dB).B.B (cA).A.A', 'GA B2 cd ecBA', 'gfed dcBA B>cdd ec c2 dB A/B/c/A/']  
X:1
L:1/8
Q:1/4=140
M:2/4
K:Bb
 (dB).B.B | (cA).A.A | B>cdd | (ec) c2 | (dB).B.B | (cA).A.A | B>cdB |{d} c2 B2 :: F2 GA | B2 cd | 
 ecBA | B/A/B/c/ B2 | F2 GA | B2 cd | ecBA |{c} B2 B2 :: f2 ga |{ga} b2 ag | gfed | dcBA | B>cdd | 
 ec c2 | dB A/B/c/A/ | B2 B,2 :|  