Design a composition that incorporates the specified motif and follows the alphabet-based organization.
X:1
L:1/16
M:2/4
K:Bb
['.B2Bc .d2cB Bdfg .f2df', 'B2d2B2 BA .G2{A}G^F .G2{A}G^F .G2GA .B2Bc .d2{e}d^c']  
X:1
L:1/16
M:2/4
K:Bb
 F2 | .B2Bc .d2cB | Bdfg .f2df | bfdf gfdB | cBcd cedc | .B2Bc .d2cB | Bdfg .f2df | gbfd cBcd | 
 B2d2B2 :: BA | .G2{A}G^F .G2{A}G^F | .G2GA .B2Bc | .d2{e}d^c .d2{e}dc | d=cBd .f2Bd | fgfd .f2df | 
 g^fga .g2bg | fdBd cedc | B2d2B2 :|  