Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
M:4/4
K:Bmin
['B2 Bc', 'f3 e dfaf bfaf dfaf g2 fe']  
X:1
L:1/8
M:4/4
K:Bmin
 F | B2 Bc dBBA | B2 Bc dfec | B2 Bc d3 B | ABde f2 ed | B2 Bc dBBA | B2 Bc dfec | BFFF dFAF | 
 ABde f3 || e | dfaf bfaf | dfaf g2 fe | afef dFBF | ABde f3 :|  