Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:2/2
K:Bb
['f2 b2 fe dcBd cBAc B2 BG', 'fdBd fdgd']  
X:1
L:1/8
M:2/2
K:Bb
 f2 | b2 fe dcBd | cBAc B2 BG | FGAB cdec | dcBd c2 f2 | b2 fe dcBd | cBAc B2 BG | FGAB cdec | 
 dBcA B2 :: fg | fdBd fdgd | fdBd fdbd | fdBd fdgd | edcd e2 fg | fdBd fdgd | fdBd fdbd | 
 bagf edcB | ABcd e2 :|  