//FlashingCircles.java

import java.awt.*;
import javax.swing.*;

public class FlashingCircles extends JApplet {

    int numOvals, maxWidth, maxHeight, minWidth, minHeight;
    
    public void init() {
    	String input;
	input = JOptionPane.showInputDialog( "Enter number of ovals" );
        numOvals = Integer.parseInt( input );
	
	input = JOptionPane.showInputDialog( "Enter minimum width of ovals" );
	minWidth = Integer.parseInt( input );
	input = JOptionPane.showInputDialog( "Enter maximum width of ovals" );
	maxWidth = Integer.parseInt( input );
	input = JOptionPane.showInputDialog( "Enter minimum height of ovals" );
	minHeight = Integer.parseInt( input );
	input = JOptionPane.showInputDialog( "Enter maximum height of ovals" );
	maxHeight = Integer.parseInt( input );
    }
    
    
    public void paint (Graphics g) {
	
	int width = getWidth();
	int height = getHeight();
	int w, h, x, y;

	for (int i=1; i<=numOvals; i++) {
	    //cycle thru these colors
	    if (i%7 == 0)
		g.setColor(Color.RED);
	    else if (i%7 == 1)
		g.setColor(Color.GREEN);
	    else if (i%7 == 2)
		g.setColor(Color.BLUE);
	    else if (i%7 == 3)
		g.setColor(Color.MAGENTA);
	    else if (i%7 == 4)
		g.setColor(Color.CYAN);
	    else if (i%7 == 5)
		g.setColor(Color.YELLOW);
	    else 
		g.setColor(Color.BLACK);
	    
	    //width and height of this oval
	    w = (int)(Math.random()*(maxWidth-minWidth)+minWidth);
	    h = (int)(Math.random()*(maxHeight-minHeight)+minHeight);
	    //center point of this oval
	    x = (int)(Math.random()*width);
	    y = (int)(Math.random()*height);

	    g.fillOval(x-w/2, y-h/2, w, h);
	}
    }
}