public void ChooseSprite(FeedBackImage fbi)
{
int index = (int) fbi;
rend = GetComponent<SpriteRenderer>();
rend.sprite = sprites [index];
//pra não ter que pensar muito nisso
direction -= 2 * index;
}
void CallFeedback(FeedBackImage fbi)
{
Vector3 pos = new Vector3(Random.Range(0, screenSize.x/2) - screenSize.x/4, -1.0f);
GameObject fee = (GameObject)Instantiate (feedBack, pos, Quaternion.identity);
Feedback feedbackScript = fee.GetComponent<Feedback> ();
feedbackScript.ChooseSprite (fbi);
Destroy (fee, feedTime);
}