Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
Q:1/4=240
M:2/4
K:Bb
['EE B,2 GG E2 ABAB _A4', 'BcBc BcBc', 'G2 _A2 B2 _A4']  
X:1
L:1/8
Q:1/4=240
M:2/4
K:Bb
|: EE B,2 | GG E2 | ABAB | _A4 | ABcB | ABcB | ABAB | _A2 G2 | EE B,2 | GG E2 | ABAB | _A4 | 
 B_AAG | GFFE | FGFE |1 F4 :|2 E4 |: e2 d2 | _d2 c2 | edBc | _A4 | BcBc | BcBc | BcBc | _A4 | 
 BccB | e_ddc | c_dcB | _A4 | B_AAG | GFF=E | FGF=E | F4 :| A2 B2 | E2 G2 | _A2 B2 | _A4 | A2 B2 | 
 E2 G2 | _A2 B2 | _A4 | _AB A2 | B_AAG | GFF=E | FGF=E | F4 :|  