<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>This text is the title of the document</title>
</head>
<body>
  <header>
    <picture>
      <source media="(max-width: 768px)" srcset="images/logosmall.png">
      <img src="images/logo.png" alt="Company Logo">
    </picture>
  </header>
</body>
</html>