class Buff {
  
  protected bool Active = true;
  protected int Timer;
  protected int Time = 5000;
  protected string Name = "Buff";
  
  public void Update() {
    if(Active) {
      Timer = Time.time + Time;
    }
    if(Timer > Time.time + Time && Active)
      Active = false;
  }

}

class PoisonBuff : Buff {
  
  public override void Update() {
    base.Update();
    Player.Health -= 1;
  }

}