This Anime Does Not Exist is a site that creates anime images that do not exist in the world.
When you enter this site, animated images as if you have seen them are displayed one after another in the form of a slideshow. Moving the Creativity Slider at the bottom of the screen changes the creativity of the image, and the Speed Slider lets you change the slideshow speed. You can also pause the slideshow with the space key or switch to full screen mode with the F key.
The creator of this site is Gwern Branwen, and what this site creates has increased the accuracy so that the entire body is created, and the production process can be checked through his blog. Related information can be found here.