Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
M:2/2
K:G
['B2 GB', 'Bddg e2 dc'  
X:1
L:1/8
M:2/2
K:G
 c | B2 GB c2 Ac | B2 GB AFDc | B2 GB c2 Ac | BGAF (G2 G) :: c | Bddg e2 dc | B2 GB AFDc | 
 Bddg e2 dc | BGAF (G2 G) :|  