Write musical works that keep the predetermined structure and weave in the given motif
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bb
['B2 (dB)', '(dB) (Bd)'  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bb
 B2 (dB) (fB)(dB) | B2 (dB) (cA)(GF) | !wedge!B2 !wedge!d2 !wedge!f2 !wedge!b2 | a(g/f/) c=e f4 :: 
 f2 gf gfed | c/d/c/d/ ec{B} A3 f | (dB) (Bd) c/B/A/G/ Ff | (dB) (Bd) c/B/c/d/ cf | gfga ba/g/ fe | 
 d2"^tr" c2 B4 :|  