import javax.microedition.lcdui.*;

public class MyCanvas extends Canvas {

 public MyCanvas() {
 


 }

 int r = 0;
 int g = 0;
 int b = 0;
 public void paint(Graphics g) {
   
   g.setColor(50,65,100);
   g.fillRect(0,0,getWidth(),40);
   g.setColor(r,g,b);
   g.drawString("r-"+r+"; g-"+g+"; b"+b, 5, 45,Graphics.LEFT|Graphics.VCENTER); 
 }

 
 protected  void keyPressed(int keyCode) {
  if (r<0) r=0;
  if (g<0) g=0;
  if (b<0) b=0;
  if (r>255) r=255;
  if (g>255) g=255;
  if (b>255) b=255;
   switch (keyCode) {
   
   case KEY_NUM1:
     r--;
   break;
   case KEY_NUM3:
     r++;
   break;
   case KEY_NUM4:
     g--;
   break;
   case KEY_NUM6:
     g++;
   break;
   case KEY_NUM7:
     b--;
   break;
   case KEY_NUM9:
     b++;
   break;
  }
  repaint();
 }
}