Holly wrote:

> I get all the way to step fifteen. But I can't get the spheres in different
> spots. The professor wants one sphere in front of the other two.

The sphere coordinates are <x,y,z>. Consider that your camera
is looking into the positive z direction with y pointing at the
sky to understand how changing these coordinates will affect
the position of the sphere in the image. Experiment by
changing only one of the 3 coordinates at a time.

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