Compose a piece adhering to the given musical structure and theme.
X:1
L:1/4
M:2/4
K:G
['d c', 'A B'  
X:1
L:1/4
M:2/4
K:G
 d g/f/ e d | c f/e/ d c | B G/A/ B e/d/ | A A/B/ c e/d/ | d g/f/ e d | c f/e/ d c | 
 B A/G/ F E/F/ | G z g z!fine! |: B2 d g | f2 A B | c2 f e | d2 B2 | g2 B c | B2 A c | e2 A B | 
 A2 G2!D.C.! :|  