Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
M:2/4
K:G
['GB d>e dB GE A2 A>B', 'd g2 a g>e dB A2 A>B'  
X:1
L:1/8
M:2/4
K:G
|: GB d>e | dB GE | A2 A>B | AG ED | GB d>e | dB GE | A2 A>B | AG G2 :: d g2 a | g>e dB | A2 A>B | 
 cB AG | d g2 a | g>e dB | A2 A>B | GG G2 :|  