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
['', 'f2 f3/2 e/ d B B3/2 B/', 'e d']  
X:1
L:1/4
M:4/4
K:D
 d/e/ |: f2 f3/2 e/ | d B B3/2 B/ | A d d/c/d/e/ | f e e2 | f2 f3/2 e/ | d B B3/2 B/ | A a a f | 
 e d d e :: f d e d | f d e d | f a a f | e d e d/e/ | f d e d | f d e d | f a a f | e d d e :|  