Develop melodies utilizing the stated letter notation and the provided theme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['DGBG dGBG', 'BGBd g2 gf gbag fdde']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 F | DGBG dGBG | DFAF cFAF | DGBG dGBG | BdAc BGGF | DGBG dGBG | DFAF cFAF | DGBG dGBG | 
 BdAc BGBd || g2 gf gbag | fdde fgaf | dggf gbag | fdcA BGBd | g2 gf gbag | fdde fgag | bgaf gage | 
 dBAc BG G2 |]  