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<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/licenses/publicdomain/
-->
<!DOCTYPE html>
<html>
<body style="margin:0; filter:url(#thresholdAt128);">
<div style="width:80px; height:40px; border:1px solid black;">
<div style="position:absolute; top:1px; left:1px;
border:10px solid blue; width:20px; height:20px; background:lime;"></div>
<div style="position:absolute; top:1px; left:41px;
border:10px solid blue; width:20px; height:20px; background:lime;"></div>
</div>
<div style="width:80px; height:40px; border:1px solid black;">
<div style="position:absolute; top:43px; left:1px;
width:40px; height:40px; overflow:hidden;">
<div style="border:10px solid blue; width:20px; height:20px;
background:lime; transform:rotate(30deg);"></div>
</div>
<div style="position:absolute; top:43px; left:41px;
width:40px; height:40px; overflow:hidden;">
<div style="border:10px solid blue; width:20px; height:20px;
background:lime; transform:rotate(30deg);"></div>
</div>
</div>
<div style="width:80px; height:40px; border:1px solid black;">
<div style="position:absolute; top:85px; left:1px;
width:40px; height:40px; overflow:hidden;">
<div style="border:10px solid blue; width:20px; height:20px;
background:lime; transform:rotate(30deg);"></div>
</div>
<div style="position:absolute; top:85px; left:41px;
width:40px; height:40px; overflow:hidden;">
<div style="border:10px solid blue; width:20px; height:20px;
background:lime; transform:rotate(30deg);"></div>
</div>
</div>
<svg>
<filter id="thresholdAt128" color-interpolation-filters="sRGB">
<feColorMatrix type="matrix"
values="255 0 0 0 -128
0 255 0 0 -128
0 0 255 0 -128
0 0 0 255 -128"/>
</filter>
</svg>
</body>
</html>
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