Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:Bb
['B>fd>B A>ec>A B>fd>B F2 B>A G>Be>d', 'c>B A>f=e>g f2']  
X:1
L:1/8
M:4/4
K:Bb
 (3FGA | B>fd>B A>ec>A | B>fd>B F2 B>A | G>Be>d c>BA>G | F>f=e>f g>f_e>c | B>fd>B A>ec>A | 
 B>fd>B F2 B>A | G>Be>d c>BA>c | B2 d2 B2 :: c>B | A>f=e>g f2 c>B | A>f=e>g f2 g>f | 
 =e>fg>a b>cd>e | f>=ef>g f>ec>_e | d>^cd=c =B>df>d | c>dc>B A>BA>F | B>df>b g>ec>A | B>df>b B2 :|  