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:2/4
K:E
['B ^A B c B', 'e e']  
X:1
L:1/8
M:2/4
K:E
 B | ^A B c B | D D D B | ^A B c B | E E E || B | e e e G | c c c F | B B A F | E E E2 :|  