Color in some of my older books was done using separations that I made myself. This page shows how those separations combine to make the colors that are printed. Each page is made up of black, red, blue, and yellow layers. This is very similar to the way that color is made on computer screens. There red, green and blue are combined to make the colors you see. Click the icons on the left to the pieces and how they combine in this turtle drawing. There is a small mistake on this page where something come out the wrong color. Can you find it?