Awesome slides!!! I'd heard of Piet, but never seen the primaltity tester. It really looks like a Mondrian! Another thing I really like is Typogenetics, inven

Awesome slides!!! I'd heard of Piet, but never seen the primaltity tester. It really looks like a Mondrian! Another thing I really like is Typogenetics, invented by Douglas Hofstadter. It's a formal system inspired by molecular biology and is almost definitely Turing complete (though I haven't looked for a proof).