SpiralBug.java

import info.gridworld.actor.Bug;

public class SpiralBug extends Bug {
    private int steps;
    private int sideLength;
    
    public SpiralBug(int length){
        steps = 0;
        sideLength = length;
    }
    
    public void act()
    {
        if (steps < sideLength && canMove())
        {
            move();
            steps++;
        }
        else
        {
            turn();
            turn();
            steps=0;
            sideLength++;
        }
    }  
}