Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:2/4
K:Bb
['B,>C B,/C/D/E/ FFF[BA] ABAB F/G/F/E/ D2 Cc/c/cc', '.g.g.b.g .g.f f2 d3 f']  
X:1
L:1/8
M:2/4
K:Bb
|: B,>C B,/C/D/E/ | FFF[BA] | ABAB | F/G/F/E/ D2 | Cc/c/cc | dBBB | Fc/c/ cc | dB B2 :: f3 b | 
 a.g.g.g | .g.g.b.g | .g.f f2 | d3 f | feed | dccB | BAGF | f3 .b | .a.g.g.g | .g.g.b.g | .g.f f2 | 
 d3 f | ff/g/ ee/f/ | dd/e/ cc/d/ | B4 :|  