Write musical works that keep the predetermined structure and weave in the given motif
X:1
L:1/8
M:2/2
K:Bb
['dc B2 B,2 B,DB,D DFEG F3 B', 'de fdcB dBfe dBfB bBfB'  
X:1
L:1/8
M:2/2
K:Bb
 dc | B2 B,2 B,DB,D | DFEG F3 B | GBeg fdcB | A2 c2 c2 dc | B2 B,2 B,DB,D | DFEG F3 B | GBeg fdcB | 
 F2 B2 B2 :: de | fdcB dBfe | dBfB bBfB | defg fdcB | A2 c2 c2 de | fdcB dBfe | dBfB bBfB | 
 gefd ecdB | F2 B2 B2 :|  