Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
['d B2', 'b2 g2']  
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
 d | B2 d2 d3 e | d2 cB A3 d | B2 G2 B2 d2 | g6- g :: d | b2 g2 b2 g2 | bagf e3 f | g2 fe d2 B2 | 
 d6 ef | g3 f edcB | ABcd e2 g2 | d2 cB A2 G2 | c6 d2 | e2 fg fgaf | g6- g :|  