clear all;
close all;
x=[1 0 0 0]
z=x;
    for i=1:14
       y=xor(x(3),x(4));
       for k=3:-1:1
       x(k+1)=x(k);
       end
       x(1)=y;
       x
       z(i+1,1)=x(1);
       z(i+1,2)=x(2);
       z(i+1,3)=x(3);
       z(i+1,4)=x(4);
    end
for i=1:15
    y(i)=z(i,4);
end
y