Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:6/8
K:C
['(de)f (fg)f', '(dB)G (GAG)'  
X:1
L:1/8
M:6/8
K:C
 (de)f (fg)f | (de)f (fg)f | (ec)e (dB)G | c2 c (e2 c) :: (dB)G (GAG) | (dB)G (GAG) | (ef)g (dB)G | 
 c2 c (e2 c) :|  