htmlcss/keyframes.css at main · cripop/htmlcss · GitHub

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body {
  background: #333;
}

.box {
  background: white;
  width: 400px;
  height: 400px;
  position: relative;
  animation-name: myanimation;
  animation-duration: 4s;
  animation-iteration-count: infinite;
  animation-fill-mode:forwards;
  animation-delay: 2s;
  animation-direction:alternate-reverse;
  animation-timing-function: linear;
}

@keyframes myanimation {
  0% {
    background-color: white;
    left: 0px;
    top: 0px;
    border-radius: 0 0 0 0;
  }
  25% {
    background-color: red;
    left: 300px;
    top: 0px;
    border-radius: 50% 0 0 0;
  }
  50% {
    background-color: green;
    left: 300px;
    top: 300px;
    border-radius: 50% 50% 0 0;
  }
  75% {
    background-color: blue;
    left: 0px;
    top: 300px;
    border-radius: 50% 50% 50% 0;
  }
  100% {
    background-color: white;
    left: 0px;
    top: 0px;
    border-radius: 50% 50% 50% 50%;
  }
}

/* @keyframes myanimation {
  0% {
    background-color: white;
    border-radius: 0 0 0 0;
  }
  25% {
    background-color: red;
    border-radius: 50% 0 0 0;
  }
  50% {
    background-color: green;
    border-radius: 50% 50% 0 0;
  }
  75% {
    background-color: blue;
    border-radius: 50% 50% 50% 0;
  }
  100% {
    background-color: white;
    border-radius: 50% 50% 50% 50%;
  }
} */