Random.seed = Random.Range(42,9000);
    for (var i = 0; i < cM; i++)   
    {
     for (var i2 = 0; i2 < cM; i2++)   
     {
      if(charRand[i]==charRand[i2] && i!=i2)
      {
       charRand[i] = Random.Range(0,8);
      }
     }
                  }

hit.collider.gameObject.GetComponent(твойСкриптЮнитаГдеЕгоХП).hp-=damage;

  for (var i = 0; i < cM; ++i)   
    {
     for (var i2 = 0; i2 < cM; ++i2)   
     {
      charRand[i]=Random.Range(0,8);
      if(i!=i2 && charRand[i]==charRand[i2])
      {
       charRand[i2]=Random.Range(0,8);
      }
     }
    }

renderer.material.mainTextureOffset = Vector2 (Time.time*1.0, 0);

transform.Rotate(Vector3.forward*(200*Time.deltaTime));

if(walk && Hit.collider.name == "Dirt"){//это
timeout = 0;
audio.PlayOneShot(step);
}
if(!walk && Hit.collider.name == "Grass"){
timeout = 0;
audio.PlayOneShot(step2);
}

if(walk)
{
        timeout = 0;
        audio.PlayOneShot(sound);     
}
if(Hit.collider.name == "Dirt")
       sound=step;
if(Hit.collider.name == "Grass")
       sound=step2;