Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:2/4
K:G
['G>A BB cB Ac', 'dc/B/ AA/B/ cB/A/ GB AG', '_BA/G/ BA/G/ FG A2 DE FG'  
X:1
L:1/8
M:2/4
K:G
 G>A BB | cB Ac | BA GF | E2 D2 | G>A BB | cB Ac | BG AF | G2 G2 :: dc/B/ AA/B/ | cB/A/ GB | 
 AG FG | A2 A2 | dc/B/ AA/B/ | cB/A/ GB | AG GF | G2 G2 :: _BA/G/ BA/G/ | FG A2 | DE FG | A_B AG | 
 _BA/G/ BA/G/ | FG A2 | DE FG | GF G2 :|  