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

public class squares extends Applet
{
	Dimension appletSize;
	int xCoord = 0;
	int yCoord = 0;
	final int width = 30;
	final int height = 30;
	int xCount;	
	int yCount;	
	public void paint(Graphics g)
	{
		appletSize = this.getSize();		// get the dimensions of this applet
		xCoord     = 0;						// start in the top left corner
		yCoord     = 0;
		yCount     = 1;
													// loop over the applet height
		do
		{
			if (yCount % 2 == 0)
			{
				xCount      = 1;
			}
			else
			{
				xCount = 0;
			}
			xCoord = 0;
													// loop over the applet width
			do
			{
				if (xCount % 2 == 0)
				{
					g.setColor(Color.white);
				}
				else
				{
					g.setColor(Color.black);
				}
				g.fillRect(xCoord, yCoord, width, height);
				xCoord = xCoord + width;
				xCount = xCount + 1;
			} while (xCoord < appletSize.width);
			
			yCount = yCount + 1;
			yCoord = yCoord + height;
		} while (yCoord < appletSize.height);
	}
}