3d animation not working

[danton267]

dt = .01;
[x, y, z] = deal( 0 );
[X,Y,Z] = sphere(30);
surf(X,Y,Z,'edgecolor',[1 1 1]*0.8,'Facecolor','none')
hold on
k = 0;
while norm([x y z])^2 < 1 && k < 1000
    t = 180*(rand-1);
    p = 180*(rand-1);
		% spherical system of coordinates
    x = x + dt*cosd(t)*cosd(p);
    y = y + dt*cosd(t)*sind(p);
    z = z + dt*sind(p);
    k = k + 1;
    pause(0.1)
    plot3(x,y,z,'.b')
end 
hold off

It is supposed to be random walk in 3d.
results in: https://chart-studio.plotly.com/~danton267/1370/#/