body {
  margin: auto;
  box-sizing: border-box;
}

.wrap {
  padding-top: 1%;
  margin: 0 auto;
  width: 500px;
  .box {
    text-align: center;
    width: 100px;
    height: 100px;
    background: #ffc04c;
    border-radius: 100px;
    animation: move 2s infinite;
  }
}

@keyframes move {
  0% {
    border-radius: 100px;
    transition: all 0.25s;
  }
  20% {
    border-radius: 60px;
    background-color: #5cff47;
    transition: all 0.25s;
  }
  40% {
    border-radius: 0px;
    background-color: #ff2970;
    transition: all 0.25s;
  }
  60% {
    border-radius: 60px;
    background-color: #22d1f0;
    transition: all 0.25s;
  }
  100% {
    border-radius: 100px;
    background-color: #ffc04c;
    transition: all 0.25s;
  }
}