var hp : float = 100.0;
var damage : float = 0.1;
var regeneration : float = 0.01;
private var orderDamage : boolean;

function OnTriggerEnter(area) {   
      orderDamage = true;
}
function OnTriggerExit(area) {   
      orderDamage = false;
}
function FixedUpdate () {
      if (orderDamage)   
          hp -= damage;
      else if (hp < 100.0)   
          hp += regeneration;
}

var hp : int = 100.0;    
    var damage : int = 10;    
    var regeneration : int = 0;
    var a : int;    
    private var orderDamage : boolean;    
    private var timeDamage : boolean;    

    function OnTriggerEnter(area) {      
         orderDamage = true;    
    }    
    function OnTriggerExit(area) {      
         orderDamage = false;    
    }    
    function FixedUpdate () {    
         if (orderDamage) {     
             a = -damage;
             if (timeDamage == true) { Damage (); }
         } else { if (hp < 100.0)  {    
             a = regeneration;
             if (timeDamage == true) { Damage (); }
    } } }

function Damage () {
timeDamage = false;
hp += a;
yield WaitForSeconds (1);
timeDamage = true;
}