Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
Q:1/4=90
M:2/4
K:G
['dB c/B/A/G/ AG', 'Bd ef']  
X:1
L:1/8
Q:1/4=90
M:2/4
K:G
"_VB" e | dB c/B/A/G/ | AG E(E/F/) | GG G/A/B/c/ | d2 Be | dB c/B/A/G/ | AG E(F/G/) | FA D(E/F/) | 
 G2 G || d | Bd ef | gd BG | Bd ef | g2 fg | ed BG | B/A/G/F/ E(F/G/) | FA D(E/F/) | G2 G |]  