Computational Public Spaces [video]

> So this is my presentation software. It's 25 lines of code. Microsoft Powerpoint is maybe 20 million lines of code; you don't need it.

The speaker then spontaneously decides to demonstrate programming under this paradigm:

> I'm going to tell this piece of paper what to do ... 'when you point up at an object ... that object should be highlighted in, say, green'

Moves paper around, highlighting is performed as requested.

https://youtu.be/PixPSNRDNMU?t=612

Haven't been keeping up with Bret Victor, but that bit was just as surprising and satisfying as his other demos, for me.