# Pulsing Circles (CSS Animation)

**URL:** <https://forum.kirupa.com/t/pulsing-circles-css-animation/638202>\
**Category:** web dev\
**Created:** [May 12, 2018, 2:42am UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202 "2018-05-12T02:42:23Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Post date:** [May 12, 2018, 2:42am UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/1 "2018-05-12T02:42:24Z")

</div>

Just a little example I created to highlight a pulsing effect: [https://www.kirupa.com/animations/examples/pulsing\_circle.html](https://www.kirupa.com/animations/examples/pulsing_circle.html)

The full markup looks as follows:

```
<!DOCTYPE html>
<html>

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Pulsing Circle</title>
  <style>
    #container {
      width: 600px;
      height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      position: relative;
    }

    .circle {
      border-radius: 50%;
      background-color: deepskyblue;
      width: 150px;
      height: 150px;
      position: absolute;
      opacity: 0;
      animation: scaleIn 4s infinite cubic-bezier(.36, .11, .89, .32);
    }

    .item {
      z-index: 100;
      padding: 5px;
    }

    .item img {
      width: 150px;
      transform: translateY(1px);
    }

    @keyframes scaleIn {
      from {
        transform: scale(.5, .5);
        opacity: .5;
      }
      to {
        transform: scale(2.5, 2.5);
        opacity: 0;
      }
    }
  </style>
</head>

<body>

  <div id="outerContainer">
    <div id="container">
      <div class="item">
        <img src="https://www.kirupa.com/images/orange.png" />
      </div>
      <div class="circle" style="animation-delay: -1s"></div>
      <div class="circle" style="animation-delay: 0s"></div>
      <div class="circle" style="animation-delay: 1s"></div>
      <div class="circle" style="animation-delay: 2s"></div>
    </div>
  </div>
</body>

</html>

```

Tutorial soon when I get some time shortly 🙂

---

<div class="post-metadata">

**Author:** ![krilnon](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/krilnon/32/34_2.png) [@krilnon](https://forum.kirupa.com/u/krilnon)\
**Post date:** [May 12, 2018, 4:18am UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/2 "2018-05-12T04:18:18Z")

</div>

Looks neat! One of my first-ever websites used `deepskyblue`… this was before I learned about CSS or hex colors, etc.

---

<div class="post-metadata">

**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Post date:** [May 12, 2018, 5:05am UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/3 "2018-05-12T05:05:55Z")

</div>

Visual Studio Code always displays the list of named color values for any color property, so I scroll through them to find something interesting! The `deepskyblue` color is a great one that I stumbled upon haha.

---

<div class="post-metadata">

**Author:** ![prg9](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@prg9](https://forum.kirupa.com/u/prg9)\
**Post date:** [May 12, 2018, 7:32pm UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/4 "2018-05-12T19:32:14Z")

</div>

Any particular reason or benefit for the inline style, regarding the animation-delay ?

---

<div class="post-metadata">

**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Post date:** [May 12, 2018, 7:35pm UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/5 "2018-05-12T19:35:04Z")

</div>

I wanted to give each circle a different `animation-delay` value, and it was fewer keystrokes than creating a different style rule for each of the circles. This also makes it easier to add or remove circles if I wanted to alter this effect later. I just have to touch the HTML as opposed to making the HTML change and ensuring the CSS rules are up-to-date.

---

<div class="post-metadata">

**Author:** ![prg9](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@prg9](https://forum.kirupa.com/u/prg9)\
**Post date:** [May 12, 2018, 7:39pm UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/6 "2018-05-12T19:39:54Z")

</div>

Gotcha, was just curious - seems reasonable enough. 😄

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<div class="post-metadata">

**Author:** ![Hesam\_Moosapour](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/hesam_moosapour/32/11042_2.png) [@Hesam\_Moosapour](https://forum.kirupa.com/u/Hesam_Moosapour)\
**Post date:** [February 13, 2020, 9:16pm UTC](https://forum.kirupa.com/t/pulsing-circles-css-animation/638202/7 "2020-02-13T21:16:02Z")

</div>

Thank U
