Copied from original lesson at http://learningwebgl.com/blog/?p=684
Initializing…
Use lighting
(Use cursor keys to spin the box and
Page Up/Page Down to zoom out/in)
Directional light:
| Direction: | X: | Y: | Z: |
| Colour: | R: | G: | B: |
Ambient light:
| Colour: | R: | G: | B: |