Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/8
M:2/2
K:G
['G2 G2', 'c2 (dc)'  
X:1
L:1/8
M:2/2
K:G
 (3(DEF) | G2 G2 GBdB | A2 A2 Acec |1,3 Bdgf edcB | AGFE DcBA :|2,4 BdBG AcAF | G2 B2"_D.C." G2 |: 
 d2 | g2 (gf) gbag | f2 d2 d2 (de) | =fefg fagf | e2 c2 c2 (dc) | BGBd g2 (fg) | afdB c2 (dc) | 
 BdBG AcAF | G2 B2 G2 :|  