Instead of using multiple divs try this
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Life Check Website</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body style="background-color: #000000;color: #996666;font-size: medium">
<div style="width:100%;height:100%;text-align: center;margin-top: 15%">
<a title="Home" href="home.html" target="_self">
<img title="" height="277" alt="" src="/images/underconstruction.jpg" width="322" border="0">
</a>
<p style="clear:all"></p>
You may enter the site,<br>
But please note it is under Construction.<br>
Sincerely<br>
EvO<br><br>
ShoutOut:<br>
Hey Kimi my baby!<br>
Morning my angel

<br>
Mwa mwa mwa mwa mwa<br>
From:EvO
</div>
</body>
</html>
You can put the css in a stylesheet file to save page weight