% 
% Written by:
% -- 
% John L. Weatherwax                2007-07-01
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

clc; 

S = [ 
    0 1 0 1 0 ; 
    1 0 1 0 0 ; 
    0 1 0 0 1 ;
    1 0 0 0 1 ; 
    0 0 1 1 1  
    ]; 

S^2
S^3