Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
M:4/4
K:C
['FAdc d2', '(ef) gfge c2'  
X:1
L:1/8
M:4/4
K:C
[M:2/2][K:D] .abc (AG) | FAdc d2 (AG) | FAdc d2 (A^G) | Aced cBA^G | Aced cBA=G | FAdc d2 (AG) | 
 FAdc d2 A2 | BcdB cdec | f2 d2 d2 :: (ef) | gfge c2 (Ac) | dcdB A2 (GF) | GABG FGAF | 
 EDEF E2 (ef) | gfge c2 (ec) | dcdB A2 (^GA) | BcdB cdec | f2 d2 d2 :|  