<div style="--gradient: linear-gradient(red, gold, yellow, blue, lime, #09f)"></div>
<div style="--gradient: radial-gradient(circle at left top,red, gold, yellow, blue, lime, #09f)"></div>
<div style="--gradient: conic-gradient(red, gold, yellow, blue, lime, #09f)"></div>
<div style="--gradient: repeating-linear-gradient(red, red 10%, gold 10%, gold 20%)"></div>
<div style="--gradient: repeating-radial-gradient(circle at left top, red, red 10px, gold 10px, gold 20px)"></div>
<div style="--gradient: repeating-conic-gradient(red, gold 20deg)"></div>
<div class="dotted" style="--gradient: radial-gradient(#ff8a00 35%, transparent 35%)"></div>
<div class="stripe" style="--gradient: repeating-linear-gradient(45deg, white 0%,white 7.5px,hotpink 7.5px,hotpink 15px,white 15px,white 22.5px,hotpink 22.5px,hotpink 30px)"></div>
@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #222;
  color: #fff;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px 10px;
  padding: 10px 10px 36px;
  font-size: 1.5rem;
  place-content: center;
}

div {
  min-height: 40vh;
  border: 10px solid transparent;
  background-image: linear-gradient(#222, #222), var(--gradient);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-radius: 10px;
  position: relative;
  padding: 0 10px;
  animation: animatedgradient 30s linear alternate infinite;
  background-size: 500% 500%;
}

div::after {
  content: attr(style);
  font-size: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  line-height: 1.5;
}

.dotted {
  background-size: 2px 2px;
}

@keyframes animatedgradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 150%;
  }
  100% {
    background-position: 0% 50%;
  }
}

External CSS

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External JavaScript

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