Develop a tune according to the designated alphabetic musical pattern and the provided melody.
X:1
L:1/8
M:6/8
K:Bb
['B,2 B', 'fdB cdB AGF']  
X:1
L:1/8
M:6/8
K:Bb
 B | B,2 B BAB | cBA ecA | B,2 B BAB | dBd fga | bag fed | cdB AGF | B,2 B cde | dec B2 :: d/e/ | 
 f>gf fdB | cdB AGF | fgf fdB | geg gab | fgf fdB | cdB AGF | B,2 B cde | dec B2 :|  