//CS5-HMC-Sp.,00-HW4-7
//A. Khakpour, Feb., 00

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

public class Rainbow1 extends Applet
{
   private final int NUM_COLORS = 7;
   private final int NUM = 8;
   private final int WIDTH = 300;
   private final int HEIGHT = 200;
   private final int START_X = 20;

   //-----------------------------------------------------------------
   //  Paints a rainbow.
   //-----------------------------------------------------------------
   public void paint(Graphics g)
   {
      setBackground (Color.cyan);

      int x = START_X, y = HEIGHT - WIDTH/2 + START_X;
      int width = WIDTH - 2 * START_X, height = width;

      for (int color =1; color <= NUM_COLORS; color++)
      {
         switch(color)
         {
            case 1:
               g.setColor(Color.red);
               break;
            case 2:
               g.setColor(Color.orange);
               break;
            case 3:
               g.setColor(Color.yellow);
               break;
            case 4:
               g.setColor(Color.green);
               break;
            case 5:
               g.setColor(Color.blue);
               break;
            case 6:
               g.setColor(Color.magenta);
               break;
            case 7:
               g.setColor(Color.cyan);
         }
         g.fillArc (x, y, width, height, 0, 180);

         x += NUM;  y += NUM; width -= 2*NUM; height -= 2*NUM;
      }
   }
}