Compose a piece of music that combines the given melodic theme with the assigned alphabetical pattern.
X:1
L:1/8
M:4/4
K:G
['BA G3 GGGGc c2 z4 DF G3']  
X:1
L:1/8
M:4/4
K:G
 BA | G3 GGGGc | c2 z4 DF | G3 AGAed | B2 z4 GA | B3 dcBAG | E2 z3 CB,A, | DEFA e2 d2 | B2 z4 |]  