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:3/8=120
M:6/8
K:G
['G GAG']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 G | GAG B2 B | AGA G3 | GAB A2 G | G3 z2 G | GAG g2 g | ede d2 G | GAG g2 g | ede d2 e/f/ | 
 g2 g f2 B | e2 e d2 G | cBA Bcd | efg fga | GAB A2 G | G3 G2 |]  