Clear Color value referenced in text on Page 40 incorrect

[michaelhiatt]

On page 40 there is some discussion regarding clearing the color in the Init function.

Looking back to page 32, the color is set to 0.0, 0.0, 0.0, 0.0. The discussion on page 40 mentions it being set to 1.0, 1.0, 1.0, 1.0.