<html>
<head>
<style>
.container { display:inline-block; width:220px; }
.multicol { -moz-column-width:100px; -moz-column-gap:10px; -webkit-column-width:100px; -webkit-column-gap:10px; -webkit-column-fill:auto; column-width:100px; column-gap:10px; column-fill:auto; height:300px; border:5px solid black; }
.block { width:100px; height:100px }
.block:hover { background-color: maroon !important; }
.layer { height:400px; width:100px }
</style>
<body>

<div class="container">
Overflow:
<div class="multicol">
<div class="block" style="display:inline-block; background-color:black"></div>
<div style="overflow:hidden;" class="layer">
<div class="block" style="background-color: #0000f0"></div>
<div class="block" style="background-color: #0000d0"></div>
<div class="block" style="background-color: #0000b0"></div>
<div class="block" style="background-color: #000090"></div>
</div>
<div class="block" style="display:inline-block; background-color:black"></div>
</div>
</div>

<div class="container">
Transforms:

<div class="multicol">
<div class="block" style="display:inline-block; background-color:black"></div>
<div style="margin-left: -100px; -webkit-transform: translate(100px, 0);" class="layer">
<div class="block" style="background-color: #0000f0"></div>
<div class="block" style="background-color: #0000d0"></div>
<div class="block" style="background-color: #0000b0"></div>
<div class="block" style="background-color: #000090"></div>
</div>
<div class="block" style="display:inline-block; background-color:black"></div>
</div>
</div>
</div>

<div class="container">
Relative Positioning:
<div class="multicol">
<div class="block" style="display:inline-block; background-color:black"></div>
<div style="position:relative; margin-left:-100px; left:100px" class="layer">
<div class="block" style="background-color: #0000f0"></div>
<div class="block" style="background-color: #0000d0"></div>
<div class="block" style="background-color: #0000b0"></div>
<div class="block" style="background-color: #000090"></div>
</div>
<div class="block" style="display:inline-block; background-color:black"></div>
</div>
</div>

<div class="container">
Opacity:

<div class="multicol">
<div class="block" style="display:inline-block; background-color:black"></div>
<div style="opacity:0.99;" class="layer">
<div class="block" style="background-color: #0000f0"></div>
<div class="block" style="background-color: #0000d0"></div>
<div class="block" style="background-color: #0000b0"></div>
<div class="block" style="background-color: #000090"></div>
</div>
<div class="block" style="display:inline-block; background-color:black"></div>
</div>
</div>