<!DOCTYPE html>
<html onkeydown="run(event)">
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
#main{
width:300px;height:300px;
border:1px solid blue;
}
#tank{
width:50px;height:50px;
border:1px solid red;
}
</style>
</head>
<body>
<div ;
}
},50);
</script>
</body>
</html>
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