Need some test patterns

I'm very keen on using the Processing multimedia software development tool for visualisations and interactive art.

For this project I'm hoping to get some kind of nice high-contrast test patterns to fire into the system. Maybe something like the Fermat's Spiral demo will save me having to write my own.

Does anyone have any black and white test patterns for display devices which I could use as inspiration, or even better, pre-existing processing sketches which I can run full-screen in order to capture light sequences for #project4.



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