Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Bmin
['c dBfB dBBd cAeA cAAc dBfB gBfB', 'b2 fe dBBd']  
X:1
L:1/8
M:4/4
K:Bmin
 c | dBfB dBBd | cAeA cAAc | dBfB gBfB | cAec dBB :| f | b2 fe dBBd | cAed cAAa | b2 fe dBBd | 
 cAeA cBBf | b2 fe dBBd | cAed cAAa | bfge fded | cAec cBB |]  