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=100
M:2/2
K:G
['G2 G,2 G2 A2 GA B2 AB', 'ef g2']  
X:1
L:1/8
Q:1/2=100
M:2/2
K:G
 G2 | G,2 G2 A2 GA | B2 AB c2 BA | G2 E2 C2 D2 | G,6 :: de | f2 ef g2 fe | d2 c2 B2 AB | 
 cd c2 Bc B2 | FGAF D2 gf | ef g2 A3 G | G6 :|  