/** MyApplet7.java: Nested Loops and Random Color Boxes
 ** Assignment:  Modify this file to include a title
 ** centered at the top of the applet. In addition, figure
 ** out which way, either row-by-row or column-by-column,
 ** the two nested loops in the program are painting the
 ** color boxes, and then change the program so that it
 ** paints the color boxes in the opposite way.
 ** Also, take a look at the MyApplet7.html
 ** webpage file for displaying this applet.               **/

/** USE EXISTING JAVA CLASSES **/

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

/** EXTEND THE JAVA APPLET CLASS **/

public class MyApplet7 extends Applet
   {
    int rval, gval, bval;                     // Define red, green, blue color variables.

    public void init()
       {
        setBackground(Color.white);           // Change the gray background to white.
        }

    /** CREATE THE CURRENT FRAME **/

    public void paint(Graphics g)
       {
        for (int j = 30; j < (size().height - 25); j += 30)   // Set up vertical spacing.
	  {
           for (int i = 5; i < (size().width - 25); i += 30)  // Set up horizontal spacing.
	     {
              rval =(int) Math.floor(Math.random()*256);      // Generate a random color
	      gval =(int) Math.floor(Math.random()*256);      // red, green, blue mix.
	      bval =(int) Math.floor(Math.random()*256);      // Note the "casting" here.

	      g.setColor(new Color(rval,gval,bval));          // Paint a small box with
	      g.fillRect(i,j,25,25);                          // the current random color.
	      g.setColor(Color.black);                        // Paint a black border around
	      g.drawRect(i-1,j-1,26,26);                      // the edge of the small box.
	      }
	   }
	}
     }