private IEnumerator PopAnimation()
{
int nParticles = UnityEngine.Random.Range(2, 6);
for (int i = 0; i < nParticles; i++)
{
BulletParticle particle = Instantiate(bulletParticle, transform.position, Quaternion.identity);
particle.GetComponent <Rigidbody2D>().velocity = new Vector2(UnityEngine.Random.Range(-1, 1), UnityEngine.Random.Range(0, 2));
}
yield return(new WaitForSeconds(2));
Destroy(gameObject);
yield return(null);
}
