Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/4
M:4/4
K:D
['D E']  
X:1
L:1/4
M:4/4
K:D
 vF F G A | A G F E | D D E F | F3/2 E/ E2 | uF F G A | A G F E | D D E F | E3/2 D/ D2 | vE E F D | 
 E F/G/ F D | E F/G/ F E | D E A,2 | uF F G A | A G F E | D D E F | E3/2 D/ D2 |]  