private void updateHeroDirection(Decision turn)
  {
	  if(turn == Decision.TURN_LEFT)
	  {
		  if(heroDirection == Direction.UP)
		  {
			  heroDirection = Direction.LEFT;
		  }
		  else if(heroDirection == Direction.DOWN)
		  {
			  heroDirection = Direction.RIGHT;
		  }
		  else if(heroDirection == Direction.LEFT)
		  {
			  heroDirection = Direction.DOWN;
		  }
		  else
		  {
			  heroDirection = Direction.UP;
		  }
	  }
	  else
	  {
		  if(heroDirection == Direction.UP)
		  {
			  heroDirection = Direction.RIGHT;
		  }
		  else if(heroDirection == Direction.DOWN)
		  {
			  heroDirection = Direction.LEFT;
		  }
		  else if(heroDirection == Direction.LEFT)
		  {
			  heroDirection = Direction.UP;
		  }
		  else
		  {
			  heroDirection = Direction.DOWN;
		  }
	  }
  }