Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['Bcde dcBc', 'BcBA G2 BG'  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 dc | Bcde dcBc | dBgB bBgB | Bcde dcBc | Aaag fedc | Bcde dcBc | dBgB bBgB | bagf gfed | 
 egfa gedc || BcBA G2 BG | DGBG DG B2 | BcBA G2 BG | FGAB cedc | BcBA G2 BG | DGBG DGBc | 
 dBcA BGAF | DEFG ABcA ||"^final" G8 |]  