Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/4
M:3/4
K:G
['g d B', 'g f'  
X:1
L:1/4
M:3/4
K:G
"_vb" d | g d B | G A B | c a g | f d e/f/ | g d B | c d e | d c B | A2 g | g d B | G A B | c a g | 
 f d e/f/ | g d B | c d e | d g f | g2 || (g/a/) | b g b | a f a | g e g | f d (g/a/) | b g b | 
 a f d | g f e | d2 (e/f/) | g d B | G A B | c a g | f d e/f/ | g d B | c d e | d g f | g2 |]  