Design a music composition that employs the provided motif and follows the predetermined musical form.
X:1
L:1/8
M:6/8
K:Bmin
['B3 BAB', 'Bcd f^ga efe'  
X:1
L:1/8
M:6/8
K:Bmin
 B3 BAB | cBA FEc | B3 BAB | cde edc | B3 Bcd | cBA fec | ABc efa | b2 f bdc :| Bcd f^ga | 
 efe cBA | FBc dcB | cFF F2 c | Bcd f^ga | efe cAF | EFA cBA |1 B3 Bdc ||2 B2 F Bdc :|  