How to create a trajectory animation?

How can i create an animation where i represent the trajectory of a point with 200 points, for example, and from there, by each point of the trajectory that is aggregated, i clear the first drawn point. So that it always has the same represented numbers of points in the figure. The code is the following:

imax=size(TrompoX, 2);
iframe=1;
irep=200; 
size_mov=floor(imax/10); 
movimiento = struct('cdata', cell(1,size_mov), 'colormap', cell(1,size_mov));
for ii=0:201:floor(imax)

   clf
   for jj=1:irep 
      plot(TrompoX(ii+jj), TrompoY(ii+jj),'*r')
      hold on
      axis([150 300 150 300])
      movimiento(iframe)=getframe;
      iframe=iframe+1;
   end
  end

But with this what i've achieved is to represent until 200 points and after that it deletes everything and keeps drawing the following 200 points and deletes everything again until there aren't more points.

Thanks a lot in advance for your help.