import java.awt.*;
import java.applet.*;

public class Circles extends Applet
{
	private int counter;			// loop control variable
	private int stopValue;		// loop termination variable
	private int xCoord = 150;	// initial value for xCoord
	private int yCoord = 150;	// initial value for yCoord
	int diameter;					// used to calculate circle diameter
	final int change = 20;		// change in diameter each time thru loop
	
	public void paint(Graphics g)
	{
		int numCircles;			// used to save teh number of circles to be drawn
		
		stopValue = 1;				// set the loop termination value
		counter = (int)(Math.random() * 15 + 1); // how many circles?
		numCircles = counter;						  // copy number of circles
		xCoord = xCoord - counter * (change / 2);//X coord for outer circle
		yCoord = yCoord - counter * (change / 2);//Y coord for outer circle
		while (counter >= stopValue)				  // descending loop
		{
			diameter = counter * change;			  // circle diameter this iteration
		   if (counter % 2 == 0)					  // if counter is even then
		   {
		   	g.setColor(Color.blue);				  // set drawing colour blue
			}
			else											  // otherwise
			{
				g.setColor(Color.red);				  // set drawing colour red
			}
										// draw a circle with this diameter at
										// these X and Y coordinates
			g.fillOval(xCoord, yCoord, diameter, diameter);
			counter = counter - 1;					  // subtract one from counter
			xCoord = xCoord + change / 2;			  // move X coord in by half the change in the diameter
			yCoord = yCoord + change / 2;			  // move Y coord in by half the change in the diameter
		}
		g.drawString(numCircles + " Nice circles", change, counter * diameter + change);
	}
}