Script which approximates the effect, paste into your browser's console (epilepsy warning): document.body.innerHTML = ''; setInterval(function(){document.b

Script which approximates the effect, paste into your browser's console (epilepsy warning): document.body.innerHTML = ''; setInterval(function(){document.body.style["background-color"] = 'black'; setTimeout(function(){document.body.style["background-color"] = 'white';}, 100)}, 200) You'll need to turn the lights in the room off, sit in front of the screen and close your eyes to get the effect.