Create a musical piece that includes the provided motif while adhering to the necessary musical structure.
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
['b2 f def', 'DCB, DB,F B3 DEF B,2 G, ECG'  
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
 b2 f def | g2 B G2 A | Bcd eGc | AcB AGF | b2 f def | G3 F3 | A2 B EDC | B,2 F DCB, :: DB,F B3 | 
 DEF B,2 G, | ECG c3 | =EFG C2 A, | b2 f def | geB Ege | Ced cBA | B3 B,3 :|  