import java.awt.*;

public class Diamond extends java.applet.Applet
{
    TextField tf;
    TextArea ta;
    String stars = "*******************";
    String spaces = "          ";
    int k;
    
    public void init()
    {   
        tf = new TextField("Hello    ");
        ta = new TextArea(20, 20);
        add(tf);
        add(ta);
    }
    
    public boolean action(Event e, Object arg)
    {
        if (e.target == tf)
        {
            tf.setText("Goodbye");
            k = 0;
            while (k < 10)                            
            {  
                ta.appendText(spaces.substring(0,10-k) + 
                          stars.substring(0,2*k+1)+"\n");
                k = k + 1;
            }
            k = 1;
            while (k < 10)
            {
                ta.appendText(spaces.substring(0,1+k) + 
                          stars.substring(0,19-2*k)+"\n");
                k = k + 1;
            }
            return true;
        }
        return false;
    }
}