public class RandomWalk2D {

    public static void main (String[] argv)
    {
	DrawTool.display ();
	DrawTool.setXYRange (0,10, 0,10);
	DrawTool.startAnimationMode ();

	double x=5, y=5;
	int numSteps = 0;

	while ( (x>=0) && (x<=10) && (y>=0) && (y<=10) ) {

	    DrawTool.drawCircle (x,y,0.1);
	    DrawTool.animationPause (500);

	    double r = Math.random ();

	    // INSERT YOUR CODE HERE.

	    numSteps++;
	}

	DrawTool.endAnimationMode ();
	System.out.println ("#steps=" + numSteps);
    }

}