anchor.diff:      y = y + directionSystem.mainDirection.y * distance;
     }
   
  -  //TODO: stop it if it reaches it's goal
  +  //TODO: is this implementation good enough?
     void moveTo(int x, int y) {
  -    directionSystem.setMainDirectionFromTo(this.x, this.y, x, y);
  +    directionSystem.setMainDirectionFromTo(this.x.round(), this.y.round(), x, y);
  +
  +    _checker = (){
  +      if((this.x - x).abs() <= 5 && (this.y - y).abs() <= 5){
  +        stop();
  +        _checker = null;
  +      }
  +    };
     }
   
     /**
  
positive.code:     _checkEnableGravity();
  
      _checkSpeedLimits();
  
      speedX += _accelerationDirection * accelerationX * time;
      speedY += _accelerationDirection * accelerationY * time;
  
negative.code:   State _context;
  
    num _accelerationDirection = 0;
  
    Function _checker;
  
    static const int _NO_ACCELERATION_DIRECTION = 0;
  
  