"grid--null">
<div class="grid__col-5">
    5
</div>
<div class="grid__col-7">
    7
</div>
</div>

<div class="grid--null">
<div class="grid__col-6">
    6
</div>
<div class="grid__col-6">
    6
</div>
</div>

</div>
</body>
</html>