Sphere.cs

using UnityEngine;
using System.Collections;

public class Sphere : MonoBehaviour {

    public GameObject logo;

    public void OnEnable()
    {
        //logo.SetActive (false);
    }
    public void activateLogo()
    {
        logo.GetComponent<MeshRenderer> ().material.SetFloat ("_EaseInAmount", 0f);
        logo.SetActive (true);
    }

}