<html>
<head>
<style>
  div {
    width: 100px;
    height: 100px;
    margin: 10px;
    display: inline-block;
  }
</style>
</head>
<body>
  <div style="background-color: red"></div>
  <div style="background-color: green"></div>
  <div style="background-color: blue"></div>
</body>
</html>