🤯

"a fascinating way to show users the refresh rate of their screen by spinning a specially designed zoetrope-like disc graphic at speed. As it spins, the numbers representing the viewer’s refresh rate should remain visually stable unlike surrounding numbers."

https://cohost.org/lunasorcery/post/2465593-testing-your-animati

@i_am_fabs My iMac shows both 120Hz and 60Hz as being still and not flickering, but the 2019 iMac 5k has only a 60Hz screen.