Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
M:2/2
K:G
['BcBA G2 DE GAGE D4 E2 G2', 'B4 d3 g edBc d4'  
X:1
L:1/8
M:2/2
K:G
|: BcBA G2 DE | GAGE D4 | E2 G2 B3 c | B2 A6 | BcBA G2 DE | GAGE D4 | E2 G2 B3 G | A2 G6 :: 
 B4 d3 g | edBc d4 | B2 d2 g3 d | e2 d6 | B4 d3 g | edBc d4 | B4 B3 G | A2 G6 :|  