private void walk()
	{
		setX_Point(getX_Point() + getxVel());
		
		// for graphics
		if(isWalking())
		{
		  if(timer==null){
			timer= new Timer(75);
		  }
		
		
		  if(timer.isReady())
		  {
			if(timeVar==0){
			    timeVarPosi=1;
			}else if(timeVar==3){
				timeVarPosi=-1;
			}
			timeVar+=timeVarPosi;
			timer= new Timer(75);
		  }
		}
		
		if(!flying){
			setY_Point(getY_Point()+getyVel());
		}
	}