HTML
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<!DOCTYPE html><html><head><meta charset="utf-8"><title>tmp</title><style>
body{width:100%;height:100%;
background-image:repeating-radial-gradient(circle,#dcdcdc 0px,#dcdcdc 8px,#fff 1px,#fff);background-size:28px 28px}
</style></head><body></body></html>