Develop melodies adhering to the specified musical structure and using the offered theme.
X:1
L:1/16
Q:1/4=100
M:2/4
K:Bb
['f2f2 gfed e2e2 c4', 'B4 c2c2 dcBA d2d2 B2B2 d2d2 edcB'  
X:1
L:1/16
Q:1/4=100
M:2/4
K:Bb
 f2f2 gfed | e2e2 c4 | BcdB cdec | d2f2 c4 | f2f2 gfed | e2e2 c4 | defg fedc | d2B2 B4 :: 
 c2c2 dcBA | d2d2 B2B2 | d2d2 edcB | e2e2 c2c2 | f2f2 fgaf | abag f2cA | G2Bd cABG | 
 F2GA"^D.C." Bcde |]  