//This produces random pixels that never abut.
import java.awt.*;
import java.awt.image.*;
class Main {
    static final int X = 256, Y = 256;
    static BufferedImage I = new BufferedImage(X, Y, BufferedImage.TYPE_BYTE_GRAY);
    static int fc = 0;
    static public void main( String[] args )
    {
        boolean[][] p = new boolean[X][Y];
        for(int j=0; j<X; ++j) for(int k=0; k<Y; ++k) p[j][k] = true;
        Frame f = new Frame( "paint Example" );
        f.add("Center", new MainCanvas());
        f.setSize(new Dimension(X,Y+22));
        while(true){
          for(int J = 1; J<10000; ++J) {
             int j = (int)(1 + (X-2)*Math.random()),
                 k = (int)(1 + (Y-2)*Math.random());
             if(!p[j][k] || (p[j][k-1] && p[j][k+1] && p[j-1][k] && p[j+1][k]))
                  {p[j][k] = !p[j][k]; ++fc;}}
        
        for (int i = 0; i<X; ++i) for(int j=0; j<Y; ++j)
           I.setRGB(i, j, (p[i][j] == (((i^j)&1) == 0))?0:0xffffff);
        f.show();}
    }
}
class MainCanvas extends Canvas
{
    public void paint(Graphics g)
    {
        g.drawImage(Main.I, 0, 0, Color.red, null);
        System.out.println(Main.fc);
    }
}