Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
Q:1/4=100
M:2/2
K:D
['B2 GB', 'afbg a2 fb adbd c e2 f/g/']  
X:1
L:1/8
Q:1/4=100
M:2/2
K:D
 F/G/ | AF dd B2 GB | Aa{g} f{e}d c e2 f/g/ | fdAF B2 GB | Gdce ed d :| f/g/ | afbg a2 fb | 
 adbd c e2 f/g/ | afbf gf d'f | fd cf/g/ fd df/g/ | afbg a2 fb | adbd c e2 f/g/ | afdA BdGB | 
 Adce fd d |]  