Copy & Paste this code below at http://www.w3schools.com/html/tryit.asp?filename=tryhtml_default

Then hit SEE RESULTS>> then click [Start] button

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<html>
<head>
<script>
function Start()
{
//Demo of how DataLink Air-Gap Comm Worked
//Change settimeout rate to lower number for faster screen
//The line off state means 0 and the opposite is 1
//This demo is random no data
http://www.w3schools.com/html/tryit.asp?filename=tryhtml_default
display.innerHTML="<hr>".repeat(Math.random() * 8)
display.innerHTML+="<br>"
display.innerHTML+="<hr>".repeat(Math.random() * 8)
setTimeout("Start()",50)
}
</script>
</head>
<body bgcolor="black">
<input type="button" value="Start" onclick="Start()">
<br><br>
<span id="display"></span>
</body>
</html>