Как фотку в квадрат запихнуть?
Через это
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="./style.css">
<title>Document</title>
</head>
<body>
<div class="block1"></div>
<div class="block2"></div>
<div class="block3"></div>
<div class="block4"></div>
<div class="block5"></div>
<div class="block6"></div>
</body>
</html>