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 BG DGBG', 'g2 bg dgbg gbag'  
X:1
L:1/8
M:2/2
K:G
 G2 BG DGBG | ABcA BG G2 | A3 B cABG | EAAG FADF | G2 BG DGBG | cBAB cdef | gedB c2 Bc | 
 dBcA BG G2 :| g2 bg dgbg | gbag fade | f2 af dfaf | gbag fddf | g2 bg dgbg | gbag fdef | 
 (3gfe dB c2 Bc | dBcA BG G2 :|  