Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:Bmin
['f2 (fe) fa', 'dBfB dBfB']  
X:1
L:1/8
M:2/2
K:Bmin
 a | f2 (fe) fa b2 | abaf (e/d/c/B/) Ac | f2 (fe) fa Tb2 | af ac B3 :: b | dBfB dBfB | 
 dBfB (e/d/c/B/) Ac | dBfB dBfB | (e/d/c/B/) Ac B2 :|  