Craft a musical piece that incorporates the given motif and follows the outlined structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
['Bcd ded b2 f dcB ABc cdc']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
 Bcd ded | b2 f dcB | ABc cdc | a2 c AGF | GAG BAB | g2 B ABc | dBG cAF | TG3 F3 |:  