Utilize the provided motif and the alphabetically represented musical sequence to craft an original musical composition.
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
['F2 F>G F>G']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
|: G | F2 F>G F>G B>d | c>B d>B c>B G<B | F2 F>G F>G B>g | f<B e>d c2 BG | F2 F>G F>G B>d | 
 c>B d>B c>B G<B | F2 F>G F>G B>g | f<B e>d c2 Be | d<f f>g fg/a/ b>d | c>B d>B c>B G>e | 
 d<f f>g f/g/a b>d | c>B e>d c2 BE | d<f f>g fg/a/ b>d | c>B d>B c>B G>e | F>B D>B F>G B>g | 
 f<B e>d c2 B :|  