The TV test pattern approach to behaviour

You may have seen it a hundred times.

It’s part of the cultural landscape. A meme, even.

But what does a TV test pattern actually mean?

I’d never even thought about this until I saw it revealed.

What looked random to me is actually intentional. Nearly every pixel in that pattern has meaning. 

It’s purposeful. Predictable. Testable.

Now imagine having that same discovery about behaviour.