Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/8
M:2/4
K:G
['D B>BB>A A2 GD ccc/B/d/B/ A2 z']  
X:1
L:1/8
M:2/4
K:G
 D | B>BB>A | A2 GD | ccc/B/d/B/ | A2 z D | d>edc | B2 d/c/B/A/ | GGB/A/G/A/ | G2 A2 | BBd/c/B/A/ | 
 G2 z |]  