Craft a composition using the given motif while maintaining the musical form outlined by alphabet characters.
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bmin
['f2 Ba', 'eAce fBdB fBde']  
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bmin
 f2 Bd fBde | f2 Ba eAce | f2 Ba fBde | fgaf eAce :: fBdB fBde | fBdB eAce | fBdB fBde | 
 fgaf eAce :|  