Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Emin
['', 'g3 b agfa', 'dB B/B/B']  
X:1
L:1/8
M:4/4
K:Emin
 B |: g3 b agfa | gfeg dB B2 | g3 b agfa | gef^d e/e/e g2 | g3 b agfa | gfeg dBBd | gfgb agfa | 
 gef^d e/e/e g2 :: dB B/B/B dBBg | eBBA GEEg | dB B/B/B dBBa | gef^d e/e/e g2 | dB B/B/B dBBg | 
 eBBA GEEF | dB B/B/B dBBa | gef^d e/e/e g2 :|  