Design a musical work that abides by the outlined structure and integrates the assigned theme.
X:1
L:1/8
M:2/2
K:C
['BB AA', 'G2 Bd dd'  
X:1
L:1/8
M:2/2
K:C
 BB AA GF GD | BB AA GF G2 :: Bd dd e2 dc | d2 G2 Bd dd | (d2 c2) d4 | e2 (dc) d2 (cB) | 
 c2 (BA) F2 D2 | B3 c A3 d | G2 F2 G4 :|  