W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<body>

<div class="w3-container">
  <h1>Using Font Awesome Icons</h1>

<div class="w3-padding w3-xlarge w3-teal">
    <i class="fa fa-home"></i>
    <i class="fa fa-search"></i>
    <i class="fa fa-cloud"></i>
    <i class="fa fa-trash"></i>
    Welcome!
  </div>

<div class="w3-padding w3-xlarge w3-text-orange">
    <i class="fa fa-home"></i>
    <i class="fa fa-search"></i>
    <i class="fa fa-cloud"></i>
    <i class="fa fa-trash"></i>
    Welcome!
  </div>

<p><button class="w3-btn w3-orange w3-xlarge">Button<i class="w3-margin-left fa fa-home"></i></button></p>

</body>
</html>