Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
['G2 EG D2 G2', 'BABe e3 d']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
"^Fast" (3DEF | G2 EG D2 G2 | BGAG BGAG | G2 EG D2 G2 | BGAF G2 :| A2 | BABe e3 d | Bdef g3 e | 
 BABe e3 d | BGA(G [GB]3) A | BABe e3 d | Bdef g2 f2- | fg a2 g3 d | BGA(G [GB]3) ||  