Update function

void Update()
{
    if (flipXValue < 1 && EventSystem.current.currentSelectedGameObject != null)
    {
        GameObject tileToFlip = EventSystem.current.currentSelectedGameObject;
        flipXValue += 0.2f;
        tileToFlip.transform.localScale = new Vector3(flipXValue, tileToFlip.transform.localScale.y, tileToFlip.transform.localScale.z);
    }
}