void ColorFade()
{
    fadeTimer += Time.deltaTime;

    if (fadeTimer > fadeTime)
    {
        currentColors = paintableTexture.GetPixels32();

        for (int x = 0; x <= 99; ++x)
        {
            for (int y = 0; y <= 99; ++y)
            {
                // Need to transform x and y coordinates to flat coordinates of array
                int array_pos = y * (int)paintableSprite.rect.width + x;

                // Check if this is a valid position
                if (array_pos >= currentColors.Length || array_pos < 0)
                    return;

                if (currentColors[array_pos].a > 0)
                {
                    Color colorChange = new Color(currentColors[array_pos].r,
                     currentColors[array_pos].g, currentColors[array_pos].b,
                     currentColors[array_pos].a - fadeAmount);

                    currentColors[array_pos] = colorChange;

                    Debug.Log(currentColors[array_pos].a);
                }
                else
                {
                    currentColors[array_pos] = new Color(currentColors[array_pos].r,
                     currentColors[array_pos].g, currentColors[array_pos].b, 0);
                }
            }
        }

        paintableTexture.SetPixels32(currentColors);
        paintableTexture.Apply();

        fadeTimer = 0;
    }
}