Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:4/4
K:D
['B2 B2', 'B2 B2']  
X:1
L:1/8
M:4/4
K:D
 GA | B2 B2 B2 AB | d3 e fedB | AGAB G2 GA | B4 BDGA | B2 B2 B2 AB | d3 e fedB | AGAB G2 GA | 
 G6 BA || Bdef g2 fg | eged BABd | e2 e2 f2 df | e3 f gfed | B2 B2 B2 AB | d3 e fedB | AGAB G2 GA | 
 G6 ||  