spiralBug

import info.gridworld.actor.*;
import info.gridworld.grid.*;

public class spiralBug extends Bug{
    private int steps;
    private int sideLength;

    /**
     * Constructs a box bug that traces a square of a given side length
     * @param length the side length
     */
    public spiralBug(int length)
    {
        steps = 0;
        sideLength = length;
    }

    /**
     * Moves to the next location of the square.
     */
    public void act()
    {
        if (steps < sideLength && canMove())
        {
            move();
            steps++;
        }
        else
        {
            turn();
            turn();
            length+=2;
            steps = 0;
        }
    }
}