Compose a musical piece based on the given motif and alphabet representation.
X:1
L:1/8
M:6/4
K:Bmin
['d2 a2', 'd2 cB']  
X:1
L:1/8
M:6/4
K:Bmin
 d2 a2 f2 a2 c2 BA | d2 a2 fedc f2 B2 | d2 a2 f2 ed c2 ac | BdcB ABce f2 B2 :: d2 cB d2 cB c2 BA | 
 d2 cB c2 BA f2 B2 | d2 cB d2 ed c2 ac | B2 cBAB ce f2 B2 :|  