Devise a musical creation conforming to the set musical pattern in language.
'Sectional: Through Composed'  
X:1
L:1/8
M:2/4
K:Bb
 B,>B, B,>A, | B,2 B,>A, |]: B,B, B,>A, | B,B, B,>A, | B,4 | (3B,A,A, A,2 ||[M:3/4] G,>D, D,4 || 
[M:2/4] G,>G, B,>B, | A,/G,/G, G,>G, | G,>A, A,<G, | G,>G, G, z :|  