/*
 * File: YinYang.java
 * ------------------
 * This program draws the Taoist yin-yang symbol at the center of
 * the graphics window.  The height and width of the entire figure
 * are both specified by the constant FIGURE_SIZE.
 */

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class YinYang extends GraphicsProgram {

/** Runs the program */
	public void run() {
		double x = getWidth() / 2;
		double y = getHeight() / 2;
		double r = FIGURE_SIZE / 2;
		GArc bigBlack = new GArc(x - r, y - r, 2 * r, 2 * r, -90, 180);
		bigBlack.setFilled(true);
		add(bigBlack);
		GArc smallWhite = new GArc(x - r / 2, y - r, r, r, 0, 360);
		smallWhite.setFilled(true);
		smallWhite.setColor(Color.WHITE);
		add(smallWhite);
		GArc smallBlack = new GArc(x - r / 2, y, r, r, 0, 360);
		smallBlack.setFilled(true);
		add(smallBlack);
		GArc outerCircle = new GArc(x - r, y - r, 2 * r, 2 * r, 0, 360);
		add(outerCircle);
	}

/* Private constants */
	private static final double FIGURE_SIZE = 150;

/* Standard Java entry point */
/* This method can be eliminated in most Java environments */
	public static void main(String[] args) {
		new YinYang().start(args);
	}
}