Develop a musical composition by incorporating the given alphabetic framework and motif.
X:1
L:1/8
Q:3/4=50
M:3/4
K:Bb
['F2 B3 cdc Bb B2 cB', 'B2 ABcdec dfedcB', 'ecA FAc', 'f2 =efgf_ec (c2 f2) B2 ABcdec']  
X:1
L:1/8
Q:3/4=50
M:3/4
K:Bb
 F2 | B3 cdc | Bb B2 cB | AcFAcA | Bd F2 F2 | B3 cdc | Bb B2 cB | AcFAcA | B4 :: B2 | ABcdec | 
 dfedcB | ABcdeB | df F2 B2 | ABcdec | dfedcB | ABcdeB B4 :: F2 | (3BcB (3ded (3fgf | bfd Bdf bfd | 
 ecA FAc ecA | Bdf ecA FAc | BcB ded fgf | bfd Bdf bfd | ecA FAc ecA | Bdf ecA FAc | B4 :: f2 | 
 =efgf_ec | (c2 f2) B2 | ABcdec | (d2 B2) f2 | =efgf_ec | (c2 f2) B2 | ABcdec | B2 B,2 :|  