JSFiddle - React, Tailwind, and code Playground

HTML

<form action="horizontal_form.asp">
  <input type="radio" name="angle" value="Horizontal" checked>Horizontal
  <form action="vertical_form">
  <input type="radio" name="angle" value="Vertical">Vertical
  </form>
  <div class="parent-item">

    <div id="knob"></div>
  </div>

CSS

div.parent-item {

    width: 400px;
    height:50px;
    margin: 25px;
    border-style: solid;
    border-width: 1px;

}

#knob {
  width: 50px;
  height:50px;
  background-color: grey;
  margin-left: 25%;

}

}