Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/4
M:4/4
K:G
['c/ _B A G G F2']  
X:1
L:1/4
M:4/4
K:G
 d | d c/_B/ A d | d c/_B/ A3/2 c/ | _B A G G | F2 G G/G/ | A _B/B/ c A | _B c d3/2 c/ | _B A G G | 
 F2 G |]  