Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:3/2
K:G
['G/A/B/c/ dG BG', 'AG g2 f2 eg fd df ed']  
X:1
L:1/8
M:3/2
K:G
|: G/A/B/c/ dG BG | FA Ac BA | G/A/B/c/ dG BG | DG GB AG :: g2 f2 eg | fd df ed | ce Bd Ac | 
 BG GB AG :|  