Produce pleasing melodies that correspond with the indicated letter notation and incorporate the suggested theme.
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
['f2 gfed c2']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
 d4 d4 | cdBc A2 G2 | B3 cde f2 | g2 d2 c2 B2 | f4 f4 | f2 ga b2 f2 | gfed c2 f2 | gfed c2 B2 :|  