import java.awt.Color;

import java.awt.Graphics;

/**

* A polygon that periodically changes colors on/off.

*/

public class BlinkingPolygon extends RegularPolygon {

protected boolean visible;

protected int count;

/**

* Constructs a blinking polygon.

*

* @param nsides the number of sides

* @param radius from center to vertex

* @param color initial fill color

*/

public BlinkingPolygon(int nsides, int radius, Color color) {

super(nsides, radius, color);

visible = true;

count = 0;

}

@Override

public void draw(Graphics g) {

if (visible) {

super.draw(g);

}

}

@Override

public void step() {

// toggle visibility every 10 steps

count++;

if (count == 10) {

visible = !visible;

count = 0;

}

}

}