Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
M:3/8
K:C
['g>ag g f2', 'e d2'  
X:1
L:1/8
M:3/8
K:C
 g>ag | g f2 | d/e/fg/f/ | e d2 | g>ag | g f2 | d/e/cB | c3 :: f2 f | e d2 | d/e/fg/f/ | e d2 | 
 f2 f | e d2 | dcB | c3 :|  