Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/16
M:3/8
K:Bb
['g2f2>g2 fgbcd2']  
X:1
L:1/16
M:3/8
K:Bb
 b2 | f2g2f2 | d2f2fg | fgbcd2 | c6- | c4 (3dfg | g2f2>g2 | fgbcd2 | b6- | b4 z2 | d2f2gb | 
 fgbcdf | g2f2>g2 | fgbcd2 | b2 g4 | f6- | f4 |]  