Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
['BG F3']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
|: F2 | B3 c d2 cB | Ac BG F3 E | DG FD E2 DB, | C6 F2 | B3 c d2 cB | Ac BG F3 A | c2 BA B2 AG | 
 F6 de | f4 e2 dc | d2 BG F3 E | DF Bc dB AB | G6 A2 | B2 AG A2 GF | GB AF E2 dc | BF EG F2 D2 | 
 B,6 :|  