Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
Q:1/2=90
M:4/4
K:G
['GF G2 G,4 DC B,D G4 (3(BAG)', 'G2 (DC) B,DGD B,DGD E2 C2- C2'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:G
 GF | G2 G,4 DC | B,D G4 (3(BAG) | A2 A,4 (AG) | FA d2- d2 ef | gfed edcB | cABc GFED | EGFA GBAc | 
 B2 G2- G2 :: (DC) | B,DGD B,DGD | E2 C2- C2 (ED) | CEAE CEAE | F2 D2- D2 (cB) | cd e2- edcB | 
 cABc GFED | (3(EFG) (3(FGA) (3(GAB) (3(ABc) | B2 G2- G2 :|  