Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/8=80
M:6/8
K:G
['BGG DGG BGB dcB', 'gdg gdg', 'faf dcd Adf agf']  
X:1
L:1/8
Q:1/8=80
M:6/8
K:G
 d2 c | BGG DGG | BGB dcB | cAA FAA | cAc edc | BGG DGG | BGB dcB | cBc Adc | BGG G2 :| g | 
 gdg gdg | gdg bag | fdf fdf | fdf agf | egg dgg | cgg Bgg | cAc Adc | BGG G2 :|[K:D] A | faf dcd | 
 Adf agf | gfg ece | Ace gfe | faf dcd | Adf agf | g>fg e<ag | fdd d2 :|  