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:6/8
K:G
['agf gfe', 'GAB d2 B dBe dBA GAB dBA']  
X:1
L:1/8
M:6/8
K:G
 agf gfe | fed B2 A | agf gfe | fdd d2 f | agf gfe | fed B2 A | GAB dBA | FEE E3 :: GAB d2 B | 
 dBe dBA | GAB dBA | Bee edB | GAB d2 B | dBe dBA | GAB dBA | FEE E3 :|  