Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/4
M:6/4
K:D
['d f', 'd/e/ f']  
X:1
L:1/4
M:6/4
K:D
 d | f a A d f d | B2 g e2 d | c e2 a2 f | d B g e c A | F A d A a f | d2 A D2 :: A | 
 d3/2 c/ B A/G/ F A | d/c/ B g e2 d | a3 A2 d/e/ | f d/e/ f g e/f/ g | a f/g/ a A d c | d3 D3 :|  