How to do a Pendulum Animation: Example 1

Beatnik Monster on Adobe Illustrator - with shadow, lighting and Gradient

How not to do a Pendulum Animation - Example 2

Need help! @simon

Am currently doing the Common Shaders tutorial:

When I go onto panel and then "render view",  my robot doesn't come up like this:

Instead I get this?? And at the bottom its says "Warning, Render View: selected region is too small"