public void createCollage()
  {
    Picture flower1 = new Picture("flower1.jpg");
    Picture redMotor = new Picture("redMotorcycle.jpg");
    this.copy(flower1,0,0);
    this.copy(redMotor,100,0);
    this.copy(flower1,200,0);
    Picture flowerNoBlue = new Picture(redMotor);
    flowerNoBlue.zeroGreen();
    this.copy(flowerNoBlue,300,0);
    this.copy(flower1,400,0);
    this.copy(redMotor,500,0);
    this.mirrorVertical();
    this.write("collage.jpg");
  }