Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bmin
['B2 B2 (dB)', 'defg abaf']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bmin
|:"^Irish Reel." (fe) | d2 B2 B2 (dB) | AFAB ABde | f2 B2 B2 (dB) | ABde fefa | b2 B2 B2 (dB) | 
 A2 (AB) ABde | f2 B2 B2 (dB) | ABde f2 :: (fe) | defg abaf | defg a2 (af) | defg abaf | 
 edef g2 (fe) | defg abaf | defg a2 (gf) | gfga bagf | edef g2 :|  