Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:3/4
K:Bb
['BF DB, EG/E/ DF/D/', 'cF B(3(c/B/A/) Bc d=e f2 (=e/f/)g/e/ f2', 'E2 C/F/A/c/ ed cB AG F=E/G/ F2']  
X:1
L:1/8
M:3/4
K:Bb
 uf | fg/f/ ed cB | (A/B/)c/A/ BF DB, | EG/E/ DF/D/ CE/C/ | B,D/B,/ A,C F2 | fg/f/ ed cB | 
 A/B/c/A/ BF DB, | EG/E/ DF/D/ CE |1 (D/F/)B/d/ c2 B :|2 (D/F/)B/d/ c2 B2 |: F>G AB cd | 
 de (e/d/)c/=B/ cF | B(3(c/B/A/) Bc d=e | f2 (=e/f/)g/e/ f2 | F>G AB cd | de (e/d/)c/=B/ cF | 
 BB/c/ dd/e/ fd | ec/A/ [DB]4 :: B,/D/F/B/ dc BA | GF ED/F/ E2 | C/F/A/c/ ed cB | AG F=E/G/ F2 | 
 B,/D/F/B/ dc BA | GF ED/F/ E2 | FF/G/ AA/B/ cc/d/ | e(A/c/) [DB]4 :|  