Craft a musical work based on the specified structure and given theme.
X:1
L:1/4
M:3/2
K:G
['D G F', 'G F G2', 'c B'  
X:1
L:1/4
M:3/2
K:G
 D | G F G2 A2 | G E D3 D | G F G3 A/B/ | c d A2 G3/2 G/ | A/B/ c d2 c c | B A G3/2 F/ D E | 
 =F G F3/2 E/ !fermata!D C | D D d3/2 e/ d c | B A G3 |][M:3/2][K:G][Q:1/4=120] D | 
"^(a)" G F G2 A2 | G E D3 G | G F G2 G/A/ B | c B A2 B3/2 c/ | d d/B/ c2 d G | A F/E/ D3 D | 
 G3/2 A/ B3/2 A/ !fermata!G G |[M:5/4] G d c B A |[M:3/2] B B/A/ G3 || D | 
"^(a) var." G F G2 A3/2 G/ | F E D3 G | G F G2 G/A/ B | c B A2 B3/2 c/ | d d/B/ c2 d G | 
 A F/E/ D3 D | G3/2 A/ B3/2 A/ !fermata!G G |[M:5/4] G d c B A |[M:3/2] B B/A/ G3 |]  