public void flipVerticalRectangle(int x, int y, int width, int height)
    {
      for (int sourceY = y, i = 1; sourceY >= (y - (height-1)/2); sourceY--, i+=2)
      {
        if (y > 0 && y <= this.getHeight() + height)
        {
          for (int sourceX = x; sourceX <= (x + (width-1)); sourceX++)
          {
            if (x + width > 0 && x <= this.getWidth())
            {
              Pixel sourcePix = this.getPixel(sourceX, sourceY);
              Pixel targetPix = this.getPixel(sourceX, sourceY - (height-i));
              Color tempcolor = targetPix.getColor();
              targetPix.setColor(sourcePix.getColor());
              sourcePix.setColor(tempcolor);
            }
          }
        }
      }
    }

    /**
    *  TODO: Add header comment and complete the method
    **/
    public void flipHorizontalRectangle(int x, int y, int width, int height)
    {
        // No change if square is completely outside picture
        if (!(x + width < 0 || y < 0 || x >= this.getWidth() || y >= this.getHeight() + height))
        {
          for (int sourceY = y; sourceY >= (y - (height-1)); sourceY--)
          {
            for (int sourceX = x, i = 1; sourceX <= (x + (width-1)/2); sourceX++, i+=2)
            {
              Pixel sourcePix = this.getPixel(sourceX, sourceY);
              Pixel targetPix = this.getPixel(width + (sourceX-i), sourceY);
              Color tempcolor = targetPix.getColor();
              targetPix.setColor(sourcePix.getColor());
              sourcePix.setColor(tempcolor);
            }
          }
        }
      }

  public void concatenateSound(Sound firstSound, Sound secondSound)
  {
    int endOfOriginal = this.getLength();
    int endOfFirstSound = firstSound.getLength();
    int endOfSecondSound = secondSound.getLength();

    for (int firstSoundi = 0; firstSoundi < endOfFirstSound; firstSoundi++)
    {
      this.setSampleValueAt(firstSoundi, firstSound.getSampleValueAt(firstSoundi));
    }
    for (int secondSoundi = endOfFirstSound, secondSoundj = 0; secondSoundj < endOfSecondSound; secondSoundi++, secondSoundj++)
    {
      this.setSampleValueAt(secondSoundi, secondSound.getSampleValueAt(secondSoundj));
    }
    for (int endSound = endOfSecondSound; endSound < endOfOriginal; endSound++)
    {
      this.setSampleValueAt(endSound, 0);
    }
  }


  public void concatenateSound(Sound firstSound, Sound secondSound, int switchPoint)
  {
    int endOfOriginal = this.getLength();
    int endOfFirstSound = firstSound.getLength();
    int endOfSecondSound = secondSound.getLength();

    for (int index = 0; index < endOfOriginal; index++)
    {
      if (endOfFirstSound < switchPoint) {
        for (int shortFirstSound = 0; shortFirstSound < endOfFirstSound; shortFirstSound++)
        {
          this.setSampleValueAt(shortFirstSound, firstSound.getSampleValueAt(shortFirstSound));
        }
        for (int secondSoundA = endOfFirstSound, secondSoundLength = 0; secondSoundA < endOfOriginal && secondSoundLength < endOfSecondSound; secondSoundA++, secondSoundLength++)
        {
          this.setSampleValueAt(secondSoundA, secondSound.getSampleValueAt(secondSoundLength));
        }
      }
      else if (switchPoint < endOfFirstSound) {
        for (int longFirstSound = 0; longFirstSound < switchPoint; longFirstSound++)
        {
          this.setSampleValueAt(longFirstSound, firstSound.getSampleValueAt(longFirstSound));
        }
        for (int secondSoundB = switchPoint, secondSoundLength = 0; secondSoundB < (endOfOriginal - 1) && secondSoundLength < endOfSecondSound; secondSoundB++, secondSoundLength++)
        {
          this.setSampleValueAt(secondSoundB, secondSound.getSampleValueAt(secondSoundLength));
        }
      }
    }
  }