Compose a piece of music based on the provided motif and adhering to the outlined musical structure.
X:1
L:1/8
Q:1/4=140
M:2/4
K:Bb
['B2 (3GFE D[B,B] DF', 'B4 B>df>d b>dc>B A>Bc>A a>cB>A G>AB>G g>ed>c'  
X:1
L:1/8
Q:1/4=140
M:2/4
K:Bb
 B2 (3GFE | D[B,B] DF | B2 (3dcB | AFAc | B2 (3GFE | D[B,B] DF | d>B F>A | B4 |: B>df>d | b>dc>B | 
 A>Bc>A | a>cB>A | G>AB>G | g>ed>c | B>G B/A/G/F/ | G4 ::  