Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:6/8
K:Bmin
['BdB fBf edc edc', 'Bdf b3']  
X:1
L:1/8
M:6/8
K:Bmin
 BdB fBf | edc edc | BdB fgf | afe cBA | BdB fBf | edc edc | d3- d2 e | cBA B3 | BdB fBf | 
 edc edc | BdB fgb | agf edc | BdB fBf | edc edc | d3- d2 e | cBA B3 |: Bdf b3 | afe e3 | Bdf b3 | 
 afe e3 | Bdf b3 | aee afe | gfe e2 f | cBA B3 :|  