Rather than remembering each pixel value as an address and three values for red, green, and blue (RGB), a program can check and discover that a whole region of the screen is the same color for the moment and simply say, for all the pixels between these two addresses, set them to these three values.
There shall be freedom of transit for French goods through Haifa and by the British railway through the brown area, whether those goods are intended for or originate in the blue area, area (a), or area (b), and there shall be no discrimination, direct or indirect, against French goods on any railway, or against French goods or ships at any port serving the areas mentioned.