Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:Bmin
['AFA A2 B', 'dff fef']  
X:1
L:1/8
M:6/8
K:Bmin
 (d/B/) | AFA A2 B | AFA A2 B | AFD DFA | B2 A Bcd | AFA BGB | cAc d2 (B/c/) | def gfe | fdB B2 :: 
 d | dff fef | fef fef | dff fef | dBB B2 A | dff fef | fef g2 a | bab fef | dBB B2 :|  