Plot one trajectory of a "mobile robot" following another

I am trying to plot a trajectory for a mobile robot in matlab. So far I can make the "robot" navigate from one point to another, however, I was hoping I could get it to travel to one position and then to a second position within the same simulation. I realize I might need to duplicate some code, but is there something special I have to do to break up the time steps? The following is what I have so far but it is not working...

%%Simulation
  % Time setup
  T = 100;          % Simulation time
  dt = 1;
  N = T/dt + 1;

    for ii1 = 2:N/2
        %%Cartesian state trajectory 1 here
        xdot1(ii1) = cos(th1(ii1-1))*v1(ii1-1);
        ydot1(ii1) = sin(th1(ii1-1))*v1(ii1-1);
        thdot1(ii1) = w1(ii1-1);
        ...
     for ii2 = 50:N
        %%Cartesian state trajectory 2 here
        xdot2(ii2) = cos(th2(ii2-1))*v2(ii2-1);
        ydot2(ii2) = sin(th2(ii2-1))*v2(ii2-1);
        thdot2(ii2) = w2(ii2-1);
        ...
        plot(x2,y2,'b--')
        hold on
        plot(x2(ii2),y2(ii2),'r*')
        hold off
        xlim([-10,10]/2+3)
        ylim([-10,10]/2)
        xlabel(num2str(ii2*dt))
        pause(dt*0.1)
    end
        plot(x1,y1,'b--')
        hold on
        plot(x1(ii1),y1(ii1),'r*')
        hold off
        xlim([-10,10]/2+3)
        ylim([-10,10]/2)
        xlabel(num2str(ii1*dt))
        pause(dt*0.1)

    end

[Dominika Krason]

Did you ever solved it?