Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
M:6/8
K:Bb
['B2 B']  
X:1
L:1/8
M:6/8
K:Bb
 F | B2 B B2 B | d2 B B2 B | c2 c A2 F | (F B3) z F | B2 B B2 B | d2 B B2 B | c2 c A2 F | 
 (F B3) z B | c2 c c2 B | c2 d e2 e | d2 d d2 e | f3- f2 e | d2 B B2 B | d2 B B2 B | c2 c A2 F | 
 F B3- B2 ||  