float coefficient=0;
    float currentpoint=0,topoint=1;
    float inercy=0;
    Vector3[] point = new Vector3[]{new Vector3(0,1,1),new Vector3(1,2,3)};
    void FixedUpdate()
    {
        coefficient += Input.GetAxis("Horizontal");//если будет слишком быстро умножь на Time.deltatime
        transform.position = Vector3.Lerp(point[currentpoint], point[topoint], coefficient);      
        if (coefficient < 0 && currentpoint > 0)
        {
            currentpoint--;
            topoint --;
        }
        if (coefficient > 1 && currentpoint < point.Length)
        {
            currentpoint++;
            topoint++;
        }
    }