var explosionPower = 200.0;
var explosionDamage = 100.0;

var explosionTime = 1.0;

function Start ()
{
  var explosionPosition = transform.position;
  var colliders : Collider[] = Physics.OverlapSphere (explosionPosition, explosionRadius);
  for (var hit in colliders)
    {
    if (!hit)
      continue;
    if (hit.rigidbody)
    {
    hit.rigidbody.AddExplosionForce(explosionPower, explosionPosition, explosionRadius, 3.0);
     
    var closestPoint = hit.rigidbody.ClosestPointOnBounds(explosionPosition);
    var distance = Vector3.Distance(closestPoint, explosionPosition);
    var koef = 1.0 - Mathf.Clamp01(distance / explosionRadius);
    var damage = koef * explosionDamage;
     
    hit.rigidbody.SendMessageUpwards("Damage", damage, SendMessageOptions.DontRequireReciewer);
    }
  }
   
  if (particleEmitter)
  {
  particleEmitter.emit = true;
  yield WaitForSeconds(0.5);
  particleEmitter.emit = false;
  }
Destroy (gameObject, explosionTime);
}

var hp = 100.0;

function Damage (damage : float)
{
  if (hp <= 0)
  return;
  hp = hp - damage;
  if (hp <= 0)
  {
   Destroy (gameObject);
  }  
}