Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
Q:1/4=100
M:2/2
K:Bb
['f2 dB-Bc/d/ cF-FG/A/ Bc/d/ ed c3 f', 'f2 f2 dB-Bc/d/ eE-Eg =ec-cd/e/ fF-Ff dB-Bc/d/']  
X:1
L:1/8
Q:1/4=100
M:2/2
K:Bb
 f2 | dB-Bc/d/ cF-FG/A/ | Bc/d/ ed c3 f | =ec-cd cA-AB | AfG=e f2 :: f2 | dB-Bc/d/ eE-Eg | 
 =ec-cd/e/ fF-Ff | dB-Bc/d/ eg-gf/e/ | d2{c}"^tr" c2 B2 :|  