Create a musical composition based on the alphabetized given sequence and the provided motif.
X:1
L:1/8
M:4/4
K:Bb
['BF DF', 'ba ge BG EG Bg fd BF']  
X:1
L:1/8
M:4/4
K:Bb
|: dc | BF DF BF DF | BA Bc dc d=e | fc Ac fc Ac | f=e fg f_e dc | BF DF BF DF | BA Bc dc de | 
 fg ag fe dc | B2 d2 B2 :: ba | ge BG EG Bg | fd BF DF Bf | eA gf eA gf | dB gf dB ba | 
 ge BG EG Bg | fd BF DF Bf | =ef ag f_e dc | B2 d2 B2 :|  