plotting sine graphs by moving dots

Hi! I want plot two sine graphs

like this .

v=1; %1m per sec
dt=0.01;
x=0;
y=0;
xr=-2.7;
yr=0;
theta=0;
sta_rad=deg2rad(sta); %deg->radian

for i=1:1:length(sta)
    sta_cmd(i)=sta_rad(i)-theta(i); %steering angle command

 
   %theta 개입 없이 sta_rad만 sin,cos에 관여
    %front wheel
    x(i+1)= x(i)+v*cos(theta(i)+sta_cmd(i))*dt;  
    y(i+1)= y(i)+v*sin(theta(i)+sta_cmd(i))*dt;
 
    %rear wheel: no delata
    xr(i+1)=xr(i)+v*cos(theta(i))*dt; 
    yr(i+1)=yr(i)+v*sin(theta(i))*dt;
    
    theta(i+1)=theta(i)+(v*tan(sta_cmd(i)))/L*dt %theta
end
figure();hold on;
plot(x,y,'r');
plot(xr,yr,'b');
legend('front wheel','rear wheel');

How do i draw this graph by moving two dots?

I want each of the dots draw each of the lines or each of the dots move through each lines.

[David Goodmanson]

Hi eunna,

take a look at the comet command

[eunna shin]

thanks! I'll try :)