Fish animation

[SwEeTAcTioN]

So i was playin around with awt and drew a fish now i won the fish to move across the screen which ive sorta done ive gat it to mave but the line just gets thicker(run the code if you dont understand). How do i make it draw a new line (already done) but how do i make it erase the old line:confused:

All help is appreciated:)

import java.io.*;
 import java.util.Random;
 import java.text.DecimalFormat;
 import javax.swing.*;
 import java.awt.*;
import java.awt.event.*;
import java.awt.Color;

public class Template
{
	public static void main (String args[])throws IOException
	{
      Windows win = new Windows();
      win.setSize(800,600);
      win.addWindowListener(new WindowAdapter() {public void
      windowClosing(WindowEvent e) {System.exit(0);}});
      win.show();
       }
}

class Windows extends Frame
{
       public void paint(Graphics screen)
       {
    
         Polygon fish= new Polygon();
        
         for(int x1=1;x1<=60;x1++)
         {
         fish.addPoint((125+x1),150);
         fish.addPoint((125+x1),350);
         fish.addPoint((175+x1),250);
         screen.drawPolygon(fish);
         screen.drawLine((175+x1),250,(250+x1),400);
         screen.drawLine((250+x1),400,(375+x1),275);
         screen.drawLine((375+x1),275,(260+x1),125);
         screen.drawLine((175+x1),250,(260+x1),125);
         screen.drawOval((290+x1),225,50,50);
         screen.setColor(Color.green);
         screen.fillOval((308+x1),242,20,20);
         delay(5000);
         }
         
       } 
 public static void delay(double d)
     {
     double n;
     for(n=0;(n<=d);n+=.0001);
     } 
/* public static move(int x1)           //comment out start
  {
	int move=x1+=1;
	return move;                           
  }
   public static move2(int x2)
  {
	int move2=x2+=1;
	return move2;
  }*/                                         // comment out end
}

[SwEeTAcTioN]

um... a little help please

[SwEeTAcTioN]

Im gonna mark this as solved and open it up in the AWT section