Help resetting a spline for repeat use

Hey guys, I need some help.

I am working on creating a little robot arm, the idea is to get it to draw a circle. So far so good, I have a bot, I have the kinematics set up and everything seems to work. I can even get it to draw a circle... once!

then I am stuck. What I am doing is I have a spline and a trail render that get enabled on a button push. Then at the end of the function I disable to spline controller. What I would like to happen, is when I push the button again, it draws another circle. However I get nothing.

This is the code as it stands. function circle(){ //turn on kinamatics if(ikLimb.activeSelf == false){ kinTracker.transform.position = Vector3(trailChild.transform.position.x, trailChild.transform.position.y, trailChild.transform.position.z);
ikLimb.SetActive(true); }

     //turn on path render
     drawOn();
     
     //put spline at tip of bot
     forceSplineLocation.transform.position = Vector3(kinTracker.transform.position.x, kinTracker.transform.position.y, kinTracker.transform.position.z);    
     
     //turn on spline
     kinTracker.GetComponent(SplineController).enabled = true;    
     
     //wait for path to draw
     yield WaitForSeconds(4);
     
     //turn off drawing and disable spline
     drawOff();
     kinTracker.GetComponent(SplineController).enabled = false;    

}

any guidance would be greatly appreciated.