Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/4
K:G
['EG dB A2', 'cB dG', 'ED FG D2 FG FG cB FG', 'GFGA BG Gf GG dG AB AG']  
X:1
L:1/8
M:2/4
K:G
|: gf dB | e3 f | d3 e | BG GG | EG dB | A2 DG | cB dG | Ad df | Gg fd | e3 f | de G2- | G2 GF | 
 EG dB | A2 AG | cB BG | GA F2 :: cB dG | A2 Ad | fg dB | cB AG | Gd G2 | cB dG | EG dG | F2 AG | 
 cB dG | FG ED :: FG D2 | FG FG | cB FG | E2 EB | FG dG | FG GA | cB dG | AB ed | G3 D | EDEB | 
 AG cd | GFGA :: BG Gf | GG dG | AB AG | dG Gf | Gf gf | dB ed | cB GF | GA dB |1 AG FG :|2 G3 D | 
 ED EB | AG A2- | A4 ||  