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
['B2 B2']  
X:1
L:1/8
M:4/4
K:G
 GA | B2 B2 B2 BA | G6 Bc | d2 d2 d2 dc | B4 e2 ge | d4 e2 ee | d2 dc B2 A2 | G4 z2 |]  