Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/16
Q:1/4=112
M:2/4
K:Bb
['B2Bc B2Bc', 'e2ed e2ed', 'fgab agfe defg fedc', 'B4 A2B2c2d2 e2d2c2B2 A2B2c2d2 e2d2 c4 fgab']  
X:1
L:1/16
Q:1/4=112
M:2/4
K:Bb
"^Allegretto" B2Bc B2Bc | B2Bc edcB | c2cd c2cd | c2cd fedc | d2de d2de | d2de gfed | c2cd c2c2 | 
 c2BAGF | B2Bc B2Bc | B2Bc edcB | c2cd c2cd | c2cd fedc | d2de f2e2 | dcde f2e2 | d2dB c2cA | 
 B4 B4 || f8 | f2d2g2f2 | e2ed e2ed | e2ed e4 | e8 | e2c2f2e2 | d2dc d2dc | d2dcd2 | B2Bc B2Bc | 
 B2Bc edcB | c2cd c2cd | c2cd fedc | d2de f2e2 | dcde f2e2 | d2dB c2cA | B4 B4 |: fgab agfe | 
 defg fedc | B2B2c2c2 | d2d2 c4 | fgab agfe | defg fedc | B2Bc d2c2 B2B2 B4 :: A2B2c2d2 | 
 e2d2c2B2 | A2B2c2d2 | e2d2 c4 | fgab agfe | defg fedc | B2Bc d2c2 | B2B2 B4 :|  