void FixedUpdate()
{
    if(increaseScale)
    {
        transform.localScale += transform.forward* speed;

        // when to stop
        if ((AEForward * transform.localScale.z).sqrMagnitude >= range * range)
            increaseScale = false;
    }
}

void OnTriggerEnter(Collider other)
{
    Debug.Log(other.transform);
}