Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/16
M:2/4
K:Bb
['fe d2B2 BcdB cBAG F2FE DFBF dBed', '']  
X:1
L:1/16
M:2/4
K:Bb
 fe | d2B2 BcdB | cBAG F2FE | DFBF dBed | cBAG F2fe | d2B2 B2gf | e2c2 c2cB | Acfa gbg=e | 
 f2f2 f2 ::"^8va" fe | .d(BAB)"^-" .d(BAB)"^-" | .G(EDE)"^-" .G(EDE)"^-" | cdec"^-" BcdB"^-" | 
 ABcA"^-" F2fg"^-" |"^8va" .f(BAB)"^-" .g(BAB)"^-" | .a(BAB)"^-" .b(BAB)"^-" | FGAB"^-" cdcA"^-" | 
 B2B2"^-|" B2 :|  