Blink Effect

using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour {

    SpriteRenderer spriteRenderer;

    void Start()
    {
        spriteRenderer = GetComponent<SpriteRenderer>();
    }

    public void ReceiveHit()
    {
        StartCoroutine("Blink", 2);
    }

    IEnumerator Blink(int count)
    {
        for(int i = 0; i < count; i++)
        {
            spriteRenderer.color = new Color(0.5f, 0,0);
            yield return new WaitForSeconds(0.05f);
            spriteRenderer.color = Color.red;
            yield return new WaitForSeconds(0.05f);
        }
    }
}