Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/4
M:4/4
K:G
['g/ f/ g/ a/ g d']  
X:1
L:1/4
M:4/4
K:G
 g/ f/ g/ a/ g d | B2 A G | c/ d/ e c A | B/ c/ d B G | g/ f/ g/ a/ g d | B2 A G | e/ f/ g c B | 
 A2 D2 | g/ f/ g/ a/ g d | B2 A G | c/ d/ e c A | B/ c/ d B G | g/ f/ g/ a/ g d | B2 A G | 
 e/ f/ g c B | A2 D2 | A/ G/ A/ B/ A B | c2 d e | d c B A | B G G f | g/ f/ g/ a/ g d | e c' b a | 
 b a/ g/ d f | g2 G2 | A/ G/ A/ B/ A B | c2 d e | d c B A | B G G f | g/ f/ g/ a/ g d | e c' b a | 
 b a/ g/ d f | g2 G2 |]  