Run the application to see a fully lit cube, as shown in Figure 5.3:
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Each of the given light types is succeeded by a four-valued red, green, blue, and alpha (transparency) value. The light will be positioned in the world at $(5,5,5)$ and have a magenta ambient color, a yellow diffuse color, and a green specular color. Note that OpenGL requires color channel values to be specified between 0 and 1 .