One moment please …
A square in the middle of the page with a conic gradient in it, that rotates from a dark, saturated colour to a very light, saturated colour. The angle of this gradient corresponds with the hour hand of the clock. The rest of the website, behind the square, has this exact same gradient, but this one corresponds with the minute hand. Usually, the square in the middle is clearly visible, but for a small period of time every hour, these two overlapping gradients align and the square vanishes. At first this looks like an abstract work of art, much more than a clock. But if you take your time, and you give it some attention, you may understand that it’s also a clock. It is not a clock that shows the time precisely to the second, but once you get used to it, you can see that in this browser it is approximately .