void boundaryFill(int x, int y, int fill, int bound)
	{

		// define position
		int pos = y * width + x;

		// define sample container
		int _cclr = 0;

		// check for correct size
		if (pos < (pixels.length - 1) && pos > 0)
		{
			// load a sample
			_cclr = pixels[pos];

			// System.out.println(Integer.toHexString(_cclr));
			// check if sample is already filled or is a bound
			if (_cclr != fill && _cclr != bound)
			{
				pixels[pos] = fill;

				boundaryFill(x + 1, y, fill, bound);
				boundaryFill(x, y + 1, fill, bound);
				boundaryFill(x - 1, y, fill, bound);
				boundaryFill(x, y - 1, fill, bound);
			}
		}
	}