Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/8
Q:3/8=90
M:6/8
K:G
['g2 f d2 c BGB dcB cBc', 'B>AB c2 A'  
X:1
L:1/8
Q:3/8=90
M:6/8
K:G
 g2 f d2 c | BGB dcB | cBc Aag | fge fed | gfg efg | abg fed | efg dgf | gdB G3 ::"^tr" B>AB c2 A | 
"^tr" B>AB gdc |"^tr" B>AB c2 A | bge afd |"^tr" B>AB c2 A |"^tr" B>AB gdB | efg dgf | gdB G3 :|  