.button {
    background-color: #04AA6D; /* Green */
    border: none;
    color: white;
    padding-top: 7px;
    padding-bottom: 7px;
    padding-left: 10px;
    padding-right: 10px;    
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
  .button1 {border-radius: 2px;}
  .button2 {border-radius: 4px;}
  .button3 {border-radius: 8px;}
  .button4 {border-radius: 12px;}
  .button5 {border-radius: 50%;}
  <h2>Rounded Buttons</h2>
  <p>Add rounded corners to a button with the border-radius property:</p>
  <button class="button button1">2px</button>
  <button class="button button2">4px</button>
  <button class="button button3">8px</button>
  <button class="button button4">12px</button>
  <button class="button button5">50%</button>