Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['BGAF DG G2 ABcA defg (3agf ge', 'FEFG A2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 dc | BGAF DG G2 | ABcA defg | (3agf ge fdec | dcAG Addc | BGAF DG G2 | ABcA defg | 
 (3agf ge fdAf |1 dcAF G2 :|2 dcAF G3 |: B | defg a2 fa | gede dc A2 | defg ad d2 | cdef g2 fe | 
 defg a2 fa | gfde dcAG |1 FEFG A2 BA | dcAF G3 :|2 FEFG A2 fe | dcAF G4 ||  