<html>
<head>
<style>img {
margin: 5px;
height: 100px;
width: 100px;
}</style><link rel="stylesheet" href="style.css">
</head>
<body>
<img src="https://mimo.app/r/moon.png">
<img src="https://mimo.app/r/kluane.png">
<br>
<img src="https://mimo.app/r/trees.png">
<img src="https://mimo.app/r/tokyo.png">
</body>
</html>]]>Make sure to type 5px
.