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Added 30 Aug 2026
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concentric-squares-15487
Concentric Squares
Patterns & Textures

Concentric Squares

Op-art squares nesting outward in deepening violet, drawn entirely from spreading box shadows and turning as they breathe.

Patterns & Texturesop-artconcentricsquaresbox-shadowviolet
lines of CSS
43lines of CSS
dependencies
0dependencies
browser, for years
Everybrowser, for years
stops under reduced motion
Guardedstops under reduced motion
Backdrop
Open a live copy in

Vue, Svelte, styled-components and Tailwind exports are part of Pro. HTML, CSS and React are free forever.

concentric-squares-15487.css
.fx-v13-pt-concentric-15486 {
  display: grid;
  place-items: center;
  width: 240px;
  height: 140px;
  border-radius: 0.75rem;
  overflow: hidden;
  background: #12081c;
  box-shadow: 0 0 0 1px rgba(168,85,247,0.3);
}
.fx-v13-pt-concentric-15486 i {
  display: block;
  width: 12px;
  height: 12px;
  background: #f0abfc;
  box-shadow:
    0 0 0 8px #12081c, 0 0 0 16px #c084fc,
    0 0 0 24px #12081c, 0 0 0 32px #a855f7,
    0 0 0 40px #12081c, 0 0 0 48px #9333ea,
    0 0 0 56px #12081c, 0 0 0 64px #7e22ce,
    0 0 0 72px #12081c, 0 0 0 80px #6b21a8,
    0 0 0 88px #12081c, 0 0 0 96px #581c87;
  animation: fx-v13-pt-concentric-15486-breathe 7s ease-in-out infinite;
}
@keyframes fx-v13-pt-concentric-15486-breathe {
  0%, 100% { transform: rotate(0deg) scale(1); }
  50%      { transform: rotate(45deg) scale(1.12); }
}

@media (prefers-reduced-motion: reduce) {
  .fx-v13-pt-concentric-15486,
  .fx-v13-pt-concentric-15486::before,
  .fx-v13-pt-concentric-15486::after,
  .fx-v13-pt-concentric-15486 *,
  .fx-v13-pt-concentric-15486 *::before,
  .fx-v13-pt-concentric-15486 *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0ms !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
  }
}
concentric-squares-15487.html
<div class="fx-v13-pt-concentric-15486">
  <i></i>
</div>

What do I do with this?

  1. Put concentric-squares-15487.css anywhere your page already loads CSS from — in Next.js that is app/globals.css, or any stylesheet with a <link> in your HTML.
  2. Then put the class on the element you want it on: <button class="fx-v13-pt-concentric-15486">. The CSS does nothing until a class name in it matches something on the page.
  • Link the stylesheet, then paste the markup wherever you need it.
npx hoverlab add concentric-squares-15487

What's included

  • The markup and the stylesheet, in whichever framework you pick
  • No runtime dependencies

Works with

  • React
  • Vue
  • Svelte
  • Tailwind
  • styled-components
  • Plain CSS

npx hoverlab add concentric-squares-15487

Or over MCP, from your editor's agent — no account needed.

License

Free to read, copy and install, for personal and non-commercial projects. Shipping it in client work or a paid product needs Pro ($79 once). The source lands in your repo and stops being ours — no attribution, nothing to upgrade.

Was this useful?

Motion safety

Static estimate, read from the CSS

Reduced motion
Guarded

Ships a prefers-reduced-motion block, so the loop settles into its end state for visitors who ask for less motion.

What it animates
Compositor only

Only transform, opacity or filter: the GPU can run it without re-laying-out or repainting the page.

Flashing (WCAG 2.3.1)
No flashing found

No repeating change in opacity, colour or brightness large enough to count as a flash.

Layout shift (CLS)
No shift expected

Nothing it animates moves or resizes the box in flow. A category from the CSS, not a measurement for this effect.

Every row is read from the shipped CSS. Only a figure marked measured came from a browser. Customizing the speed changes the timing, so recheck a customized copy. How it is computed

34 more effects in Patterns & Textures

All of them free to read, copy and install — no account, no locked tiles, no watermarked preview. The whole catalog is open, and so are the API and the CLI.

Browse Patterns & Textures

Shipping one commercially

Copying the code is free. Putting it in client work or a paid product is what Pro is for — the licence, not the access.

  • A commercial licence for everything in the catalog
  • Unlimited bundle exports, in Vue, Svelte and Tailwind
  • One payment — no subscription, nothing to renew
Pro — $79 once

7 variations of Concentric Squares

Finished looks, each one a position in the customizer above. Copy any of them, or open it and keep moving the sliders.