JSFiddle - React, Tailwind, and code Playground

HTML

<div id="ropes"></div>

CSS

#ropes
{
    width: 10px;
    height: 300px;
    background-color: brown;
    position: absolute;
    left: 100px;
    -webkit-transform-origin: center 0;
    -webkit-animation-name: wackeln;
    -webkit-animation-duration: 2s;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-timing-function: ease-in-out;
    -moz-transform-origin: center 0;
    -moz-animation-name: wackeln;
    -moz-animation-duration: 2s;
    -moz-animation-iteration-count: infinite;
    -moz-animation-timing-function: ease-in-out;
    transform-origin: center 0;
    animation-name: wackeln;
    animation-duration: 2s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
}
@-webkit-keyframes wackeln {
  0% {
    -webkit-transform: rotate(-20deg);
  }
  50% {
    -webkit-transform: rotate(20deg);
  }
  100% {
    -webkit-transform: rotate(-20deg);
  }
}
@-moz-keyframes wackeln {
  0% {
    -moz-transform: rotate(-20deg);
  }
  50% {
    -moz-transform: rotate(20deg);
  }
  100% {
    -moz-transform: rotate(-20deg);
  }
}
@keyframes wackeln {
  0% {
    transform: rotate(-20deg);
  }
  50% {
    transform: rotate(20deg);
  }
  100% {
    transform: rotate(-20deg);
  }
}