<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<?php
$nummer = 0;
for($i=20;$i>=0;$i-=2){
echo "<br> $i * $i = ". ($i*$i);
};
?>
</body>
</html>
Made by Thijs Aarnoudse