Compose a musical work that seamlessly incorporates the assigned motif and abides by the given alphabetical pattern.
X:1
L:1/16
M:2/4
K:A
['b b']  
X:1
L:1/16
M:2/4
K:A
 c'2 b4 c' b | a f e c B4 | b b b b f2 e' a | b8 | c'2 b4 c' b | a f e c B4 | b b b b f2 e' a | 
 e8 |]  