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
Q:1/2=90
M:2/2
K:C
['g2 ag g2 fe f2 gf ed', 'd2 e2']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
 g2 ag g2 fe | f2 gf ed c2 | d2 ed d2 cB | c2 dc B4 | d2 G2 c2 BA | B2 AG G4 :: (3BcB (3cdc d2 e2 | 
 (3BcB (3cdc d2 e2 | (3ABA (3BcB c2 d2 | e2 ^f2 g4 | c2 A2 f2 ed | e2 dc c4 :|  