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:D
['af/a/ ba fa ga/g/ Bc', 'f (3g/f/e/ fe dc BA']  
X:1
L:1/8
M:2/4
K:D
 fa af/a/ | ba fa | ga/g/ Bc | ed c/B/A | a2 af/a/ | ba fa | ga/g/ Bc | ed de :: f (3g/f/e/ fe | 
 dc BA | g>f ga | ba f/g/a | f (3g/f/e/ fe | dc BA | ga/g/ Bc | ed de :|  