drawing a line following an object

Hello I am using this code to draw a line that follows an object

 Debug.DrawLine(new Vector3(gameObject.transform.position.x,     gameObject.transform.position.y, gameObject.transform.position.z),
         new Vector3(prevPosition_x, prevPosition_y, prevPosition_z), Color.red,1.0f);
     
     prevPosition_x = gameObject.transform.position.x;
     prevPosition_y = gameObject.transform.position.y;
     prevPosition_z = gameObject.transform.position.z;

However this doesnt draw in a build. Does anyone know how to do this without using the built in line or trail renderers. I know it can be done with gl but dont have a clue how to do this.

Any help is appreciated