Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/16
M:2/4
K:Bb
['DB,DF BEGB AFAc BABc', 'gf=ef dfBc dBAB GBFE']  
X:1
L:1/16
M:2/4
K:Bb
 FE | DB,DF BEGB | AFAc BABc | dBgf edcB | (3.c.c.c(cB) GBFE | DB,DF BEGB | AFAc BABc | dBbg fdBd | 
 cBGA B2 :: f2 | gf=ef dfBc | dBAB GBFE | DFBc dBAB | gffd .c2df | gf=ef dfBc | dBAB GBFE | 
 DFBd ceAc | dcGA B2 :|  