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<!DOCTYPE HTML>
<html>
<head>
<style>
div { position:absolute; width:7px; height:7px; }
.r { top:0; left:0; background:red; }
.g { top:0; left:9px; background:lime; }
.b { top:9px; left:0; background:blue; }
.y { top:9px; left:9px; background:yellow; }
</style>
</head>
<body>
<div style="left:256px; top:0;">
<div class="r"></div>
<div class="g"></div>
<div class="b"></div>
<div class="y"></div>
</div>
<div style="left:272px; top:0;">
<div class="r"></div>
<div class="g"></div>
<div class="b"></div>
<div class="y"></div>
</div>
</body>
</html>