// percolation,  Evgeny Demidov  14 Oct 2001
  import java.awt.*;
  import java.awt.event.*;
  public class applet-math-colors extends java.applet.Applet{
    int  maxColor = 18, d = 20;
    Color col[];
  
  public void init() {
    col = new Color[maxColor];
    col[0] = Color.red;  col[3] = new Color(0,200,0);  col[6] = Color.blue;
    col[9] = new Color(220,220,0);  col[12] = new Color(0,220,220);
    col[15] = new Color(255,0,255);
    col[1] = new Color(255,150,150);  col[4] = new Color(120,255,120);
    col[7] = new Color(150,150,255);  col[10] = new Color(255,255,120);
    col[13] = new Color(120,255,255); col[16] = new Color(255,150,255);
    for (int i = 0; i < 18; i += 3) col[i+2] = col[i].darker();
  }
  
  public void paint(Graphics g) {
    for (int i = 0; i < maxColor; i++){
       g.setColor(col[i]);
       g.fillRect(i*d,0, d, 50);}
  }
  
  public void update(Graphics g){ paint(g); }
  
  }