There are so many optical systems that are out there.
Fossil and living birds reveal the dazzling biology of feathers
see this site for some coding background suggested in HN comments:
How do you become better at electronics? By building lots of circuits.
**Akiyoshi'sillusionpages**
> "The two most common elements in the universe are hydrogen and stupidity. But not in that order." — Harlan Ellison
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