Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/16
M:2/4
K:G
['aaabage2 g4']  
X:1
L:1/16
M:2/4
K:G
 aaabage2 | g4 g2e2 | aaabage2 | g4 e4 | a2ab d4 | dbbad2gg | egededB2 | d8 |]  