Develop a musical composition incorporating the given motif while adhering to the outlined alphabetical form.
X:1
L:1/8
M:4/4
K:Bb
['F B2 dB{B} A2 AB G>F GE', 'B2 F B2 Bc d2 de f>g']  
X:1
L:1/8
M:4/4
K:Bb
 F | B2 dB{B} A2 AB | G>F GE D2 CB, | B,C DE F2 (3Bcd | ed c>B B2 :| F | B2 Bc d2 de | 
 f>g fe ed cB | B2 dc B2 AB | GF ED F2 de | fd c>B BA GF | GF GE ED CB, | 
 B,C DE F2 (6:2:6F/G/A/B/c/d/ | e>d{d} cB B3 ||  