Customizing CSS Animations

This is a companion discussion topic for the original entry at


I was hoping that this trick would allow me to have a random circle moving around the screen, fully powered by a CSS animation only. As it turns out, that is possible…albeit with some major quirks.

Here is an example:

This only works in Chrome stable (as of now). It doesn’t work in Chrome Canary, Firefox, or Safari. In the keyframes, do not remove the background-color declaration. For some reason, it needs to be there to get the circle to move. No idea why :man_shrugging:

And…the video for it is up as well:

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