Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:6/8
K:Bb
['F F2']  
X:1
L:1/8
M:6/8
K:Bb
 F | F2 FFGA | B2 G G2 G | G>GGBAG | F2 B D2 F | F2 EC>AA | B2 B d2 B | c2 ce>dc | B4- B |]  