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A radar beam turns from the center of the card. Each mark on the border flashes as the beam passes over it, then fades slowly like a blip on a scope.
Also known as: radar sweep border css, radar scan card, rotating radar animation css, sonar sweep frame.
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Everything you see above is live. Basic and Pro include every premium piece, with the HTML and CSS ready to copy, plus the Tailwind version where there is one and Motions in Claude Code on Pro.
--bdr-color on the element or a parent.
Currently previewing #3b82f6.--bdr-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 16px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.