<!DOCTYPE html>
<style>
.container {
margin-right: 4px;
position: absolute;
will-change: transform;
}
.multicol {
width: 110px;
height: 150px;
border: 5px solid black;
}
.multicol > div {
float: left;
width: 50px;
height: 50px;
}
.row1_left { background-color: black; }
.row1_right { background-color: #0000b0; }
.row2_left { background-color: #0000f0; }
.row2_right { background-color: #000090; }
.row3_left { background-color: #0000d0; }
.row3_right { background-color: black; }
.row1_right,
.row2_right,
.row3_right {
margin-left: 10px;
}
#opacity .row1_right,
#opacity .row2_left,
#opacity .row2_right,
#opacity .row3_left {
opacity: 0.99;
}
.pos1 { left: 10px; top: 10px; }
.pos2 { left: 150px; top: 10px; }
.pos3 { left: 10px; top: 200px; }
.pos4 { left: 150px; top: 200px; }
</style>
<div class="container pos1">
Overflow:
<div class="multicol">
<div class="row1_left"></div>
<div class="row1_right"></div>
<div class="row2_left"></div>
<div class="row2_right"></div>
<div class="row3_left"></div>
<div class="row3_right"></div>
</div>
</div>
<div class="container pos2">
Transforms:
<div class="multicol">
<div class="row1_left"></div>
<div class="row1_right"></div>
<div class="row2_left"></div>
<div class="row2_right"></div>
<div class="row3_left"></div>
<div class="row3_right"></div>
</div>
</div>
<div class="container pos3">
Relative Pos.:
<div class="multicol">
<div class="row1_left"></div>
<div class="row1_right"></div>
<div class="row2_left"></div>
<div class="row2_right"></div>
<div class="row3_left"></div>
<div class="row3_right"></div>
</div>
</div>
<div class="container pos4" id="opacity">
Opacity:
<div class="multicol">
<div class="row1_left"></div>
<div class="row1_right"></div>
<div class="row2_left"></div>
<div class="row2_right"></div>
<div class="row3_left"></div>
<div class="row3_right"></div>
</div>
</div>