public void Add(Health health)
{
HealthDisplay display = Instantiate(displayPrefab, displaysHead);
displays.Add(display);
display.SetUp(health);
display.SetNewData(health);
health.onUpdated += OnHealthUpdate;
health.onDead += OnDead;
LayoutRebuilder.MarkLayoutForRebuild(displaysHead.GetComponent <RectTransform>());
}