Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:2/2
K:G
['G2 G2', 'edBd e^def g2 (fg) edcB cBAG AGFE', 'A^GAc B^ABd efge BdBG AcAF G2 G2']  
X:1
L:1/8
M:2/2
K:G
 (Bc) | d^ced =cBAG | BAGF GABc | dgfg |1,3 edcB | AGFE D2 :|2,4 ecAF | G2 G2 G2 :: (Bc) | 
 dgfg edBd | e^def g2 (fg) | edcB cBAG | AGFE D2 || (EF) | GFGB A^GAc | B^ABd efge | BdBG AcAF | 
 G2 G2 G2 :|  