Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/4
M:2/2
K:G
['D G2 G B A/G/A/B/ A', 'g B']  
X:1
L:1/4
M:2/2
K:G
 D | G2 G B | A/G/A/B/ A c | B g A G | A/G/F/E/ D D | G2 G B | A/G/A/B/ A g | f e/d/ e ^c | d3 |] 
 A | d2 g c | B2 g B | A c B G | A/G/F/E/ D A | B/A/B/c/ B B | c/B/c/d/ c g | B A/G/ D F | G3 |]  