Develop a tune according to the designated alphabetic musical pattern and the provided melody.
X:1
L:1/8
Q:1/2=80
M:2/2
K:Bb
['dBFB dBFB', 'B2 f2 dfBd FBDF GBcd e3 d']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:Bb
 B2 | dBFB dBFB | Bdce d3 c | BAGF EDCc | A2 F2 F2 z B | dBFB dBFB | Bdfb g3 f | edcB GecA | 
 B2 B2 B2 :: f2 | dfBd FBDF | GBcd e3 d | cBAG FABA | GFED C3 F | GFEc AGFd | BAGd e3 g | 
 fFGA BdcA | B2 B2 B2 :|  