Create a musical piece that integrates the provided motif and follows the prescribed alphabetical structure.
X:1
L:1/8
M:2/4
K:Bb
['B,,2 B,,B,, B,,B,,', 'B,, z']  
X:1
L:1/8
M:2/4
K:Bb
 F,F, F,2 | (3G,F,G, F,2 |[M:5/8] F,F,F, z F,/D,/ |[M:2/4] F,3 F, | D,C, B,,B,, | 
[M:5/8] B,,B,, z2 F, |[M:2/4] F,F, F,D, | B,,D, B,,B,, |[M:3/4] B,,D, B,,2 z F, | 
[M:2/4] B,,2 B,,B,, | B,,B,, B,,D, | B,,2 B,,B,, | B,,B,, z F, |[M:5/8] B,,B,,B,,D,/D,/C, | 
[M:2/4] B,,4 | B,,2 B,,/B,,/ z :| F,<F, (B,>F,) | F,F, C,(E,/D,/) |[M:3/4] B,,2 G,,B,,/B,,/ B,, z | 
 B,,<B,, F,>E, (3D,C,D, | (3B,,B,,B,, B,,B,, B,,2 |[M:2/4] D,/B,,/B,, D,/C,/B,, | B,,3 D, | 
 B,,B,, B,, z | (3F,E,E, (3F,E,F, | B,,2 B,,2 | (3(D,/C,)B,, B,, z | D,/C,/B,, D,/C,/B,, | 
 B,,B,, B,,B,, | B,,2 B,, z | (B,,/G,,/)G,, (G,,/F,,/)F,, | F,,/D,,/D,, D,,/D,,/D,, | D,,2 z2 |]  