void uncoverMessage()
        {

            StringBuilder bits = new StringBuilder();
            int[] arr = new int[3];
            for (int x = 0; x < image.Width; x++)
            {
                for (int y = 0; y < image.Height; y++)
                {
                    Color pixelColor2 = image.GetPixel(x, y);
                    arr[0] = pixelColor2.R % 2;
                    arr[1] = pixelColor2.G % 2;
                    arr[2] = pixelColor2.B % 2;
                    for(int i = 0; i < 3; i++)
                    {
                        bits.Append(arr[i].ToString());
                        if(bits.Length == 8)
                        {
                            richTextBox2.Text += getChar(bits.ToString());
                            bits.Clear();
                        }
                    }
                }
            }
            label5.Text = "Długość tekstu: " + richTextBox2.Text.Length;
        }