Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/8
M:4/4
K:G
['a2 ga']  
X:1
L:1/8
M:4/4
K:G
 ea a2 bage | a2 ba gede | gedB GABd | eaag a2 ga | baga bagf | eaaa a2 ga | a2 ga bage | 
 gedB G2 Bd | gedB BA A2 |]  